There is nothing you said that I find particularly scary. 

It's the only that I can affordable How did you find this deal and how did you negotiate it?

Finding a condo that allows Airbnb/STR will be challenging, they're rare and cost more because of it. 

I suggest finding a good insurance agent and a good attorney/CPA to help you get everything organized.

I have a a great project in a prime location, but finding the right investor has been pretty difficult. 

First off, has the developer provided you with a term sheet (not a commitment) from a bank showing they'd lend 75% LTC on a mixed-use development?

You are casting a very wide net without providing what your prioritized criteria might be.

This is a story from my past that provides a perfect example as to why investing in tax liens at auction is so dangerous for any but the most experienced and knowledgable investors20 years ago I purchased a SFR as a long term rental investment that sat on a double lot.  

How did you find this deal and how did you negotiate it?

@Ben Callahan, you could find a partner who is looking to buy a similar property, be a co-signer to your partner, and have that person live in it and be a primary resident.