@Jessie Griffin never use legal zoom for anything.

Perhaps a nice 1950's built bungalow.Always hire a 3rd party property inspector to give you an unbiased feel for the home.

However, even getting this done takes a lot of maneuvering and there's a risk the seller will send a third party to secure the property when they realize its vacant and they still wont allow you access.

Would like all parties to benefit. 

This later part is what makes it hard for you, if you had a big down payment then you could use some of that to make up the difference, but if your at minimum it can be hard to find that extra money. 

Also what are the legal and tax implications and procedures?

Just not legally true or factual. 

There is no legal filing to start a partnership.

Keys was also very seasonal while south Florida is a hub for events, conferences, concerts besides the typical beach/partying which means there's always an influx of travelers whether for corporate/family or spontaneous getaway.If you find something in the Keys you will make money regardless - I just found this area more profitable.

This is completely legal where we are but should be verified for your area.