On the flip side having 2 residences in one building does bring efficiencies from a management/ownership standpoint.Finally, the payment structure you mentioned (30-40% until project completion) is fairly standard for pre-construction properties.

where I would tend to agree with the OP is I have seen folks use their IRA and not understand the actual costs of ownership and end up in a tough spot when they don't have enough reserves in the IRA  ( example they have 50k and spend 45k of the cash thinking 5k is enough reserves.) ..

If the property is homesteaded, you are grandfathered only at max 3%.You can see bellow an example as the taxes increased after the change om ownership. the big difference is due to fact the area appreciated 1000% since the 90s when the house was initially purchased as a homestead.

Take ownership of your mistake and learn to do the proper due diligence recommended above😊

Nobody has a crystal ball and knows what the future holds, but if you want to introduce a partner/sell ownership interest its far easier if the property was originally owned as an LLC rather than in your personal name because selling membership interest in an LLC is far simpler than re-titling real estate. 

Once you transfer the ownership to the LLC, you individually do not have an interest in the property.  

TechVestor is 100% legitimate and it's really easy to prove imo. 1) I've been inside their properties 2) done title searches for ownership that match perfectly by date and LLC3) I’ve received distributions for over the last 18 months.

Take ownership of your mistake and learn to do the proper due diligence recommended above😊

You are most likely having trouble as you aren't on title for ownership of the property.

Yet, as I closely monitor the current housing market, I realize that stability and thorough due diligence are paramount before taking ownership.