Plenty you can do, even at 15.I think a guy your age for example could develop a nice small business of iphone consulting. 

Mike Zuber has an excellent story on how this is possible and probably an excellent way for the any new investor to develop their wealth. 

The development is expected to bring thousands of permanent jobs and promote sustainability, including eco-friendly features like walking paths and tree plantings.

https://michiganchronicle.com/2024/01/03/major-developments-that-will-define-detroit-in-2024/Hit me up if you'd like to know more.

Can I expect more development / gentrification to occur in this area?

The rules are totally pro-scarcity and anti development, that's an excellent business venture if I am pouring in billions. 

Quote from @Daniel Kulik: Hey everyone, I'm developing an automated property management software specifically designed for small to medium-sized landlords.

I am incorporating several tree houses in a development I am working on and because they are such a unique experience I have found every tree house experience is rented out 12 months in advance and attracting top dollar.  

In short, mix-use development requires a close eye on underwriting.

my self I have  been with my same commerical Banker for over 30 years without him I would not have made it through 08 to 2011.. loyalty is key,that said I have borrowed from one other commercial bank as well. my loan facilities are not what most are doing.. they are land and development loan and vertical .. and a few commercial buildings..