I have built spec houses, built tract houses against contracts, renovated houses and flipped houses. One way to fund projects like this is a rich partner or partners who puts up collateral (like an LC) so that you can borrow to complete your projects. If the first one is successful, you would be surprised how easy the second one is to get funded. The profit sharing is negotiable-it can be anything form 50/50 to 20% to you the promoter. If you would like to discuss this further, please feel free to get in touch.
The best approach in funding is using "On-Map" sale method. This means establishing your real-estate development firm, and promoting sale on "Pre-buy" basis. This way funding comes through costumers. minimal loan might be required for promoting needs.
Loan requests can be established through CPA firms.
Another method is utilizing major development companies on partnership basis, yet I wouldn't recommend it as most of sale profit wouldn't be yours.
happy to discuss further in details any required details.
I am only responding to this question because I have recently done the exact thing. It may not be the best solution for your question but in my case this was something I started doing with 3 other friends. We all have other sources of income but really like building and designing things so we have recently put our money together and started repurposing small shipping containers as homes. Start talking to some friends or colleagues and get a feel for who might be interested in doing some projects on the side to bring in some side-income. Are you hoping to become a developer or just a property owner/manager?