Similar suggestions?

the only one i can think of is this:

http://www.mangago.zone/read-manga/daites_ryou_koubouki/hs/hs_chapter-1/

http://www.mangago.zone/read-manga/cheat_pharmacist_s_slow_life_making_a_drugstore_in_another_world/

is another one like this one where the MC is involved in pharmaceuticals. though it's on a smaller scale and more relaxed slice of life.



http://www.mangago.zone/read-manga/shin_no_nakama_janai_to_yuusha_no_party_wo_oidasareta_node_henkyou_de_slow_life_suru_koto_ni_shimashita/

he runs a little medical shop. slice of life.



http://www.mangago.zone/read-manga/tensei_shite_inaka_de_slowlife_wo_okuritai/

he invents stuff and helps out his father's domain. slice of life.



http://www.mangago.zone/read-manga/isekai_kenkokuki/

a lot of land development and inventions to advance the economy. has action but is also kinda slice of life.



http://www.mangago.zone/read-manga/isekai_nonbiri_nouka/

title kinda says it all. farming life in another world. slice of life.



http://www.mangago.zone/read-manga/jui_san_no_oshigoto_in_isekai/

he gets summoned to this world to cure magic diseases, turns out the diseases weren't all that magical but he cures them anyway.



http://www.mangago.zone/read-manga/genjitsushugisha_no_oukokukaizouki/

i dunno that i'd say he helps out the economy, but he does end up having to run a kingdom and deal with a war.



http://www.mangago.zone/read-manga/kenja_no_mago/

this one is kinda pushing it, but he does make a lot of magical inventions that boost the economy i guess?

thank you for this I've been running out of mangas to read so i appreciate this so much

yw! (●'◡'●)ﾉ

I need to follow you now so you can recommend me some good stuff

go for it! lol

This has action and harem, but the invention parts and development of characters are good... Ive read the novel
http://www.mangago.zone/read-manga/release_that_witch/

oh yea that one was pretty good, i just dont like that the main love interest is one step above a loli...other than that its pretty good.

I am also in love with those kind of stories! If you are still looking for something to read, I recommend these 5 to you:

Doctor Elise is very similar but with a female lead. [Reincarnated, Medical, Webtoon, Europe-like setting, Awesoomee! haha] :
http://www.mangago.zone/read-manga/doctor_elise

If you liked it, also try Medical Return which is another work of the same author [Reincarnated, Medical, Modern setting, Webtoon, Male lead] :
http://www.mangago.zone/read-manga/medical_return

Another is That Time I Got Reincarnated as a Slime (If you haven't tried it yet...) [Reincarnated, Kingdom-building, Male lead?, Manga/Anime] :
http://www.mangago.zone/read-manga/tensei_shitara_slime_datta_ken

Also try The Accomplishments of the Duke's Daughter.
[Reincarnated, Manga, Economy stuff, Female lead] :
http://www.mangago.zone/read-manga/koushaku_reijou_no_tashinami

And lastly, try The Beginning After the End. It's only in the reincarnation tag, but it is lit! [Reincarnated, Magic, Webtoon, Male lead, Awesoomee!] :
http://www.mangago.zone/read-manga/the_beginning_after_the_end/?av=1

I think you should try Doctor Elise first, since it is the closest, I think, to what you're looking for. And it's very timely cuz it also have parts about a plague. (๑•ㅂ•)و✧

Anna and the gang aren't suppose to be lolis! The novel was much better..TAT
Idk what was going on with the artist who draw anna and the mc's sister like thatbut it wasnt supposed to be like that

YEAHHH IKR!!! I think it was kinda more serious, yet still fun, in the novel. RTW was the novel that I enjoyably tried to finish. I tried to check the webtoon and I dropped it at the first chapter. I felt really disappointed. It was better in the novel for me. They should've just continued the anime adaptation or left it as is.（￣へ￣）

It was korean novel too, like solo leveling. But why are they so different in manhwa adaptation *kheok dies* ... A lot of people would've gone to read it if the art style was more vivid and not half-assed (no offense whoever artist you are)

Well, adaptations are usually a mess. Maybe it's because we all have our own versions of the story in our minds. Still...I think it's better to read solely the novel.