However, I need to find the easiest/fastest way to transfer them to the business so I can separate the investment properties from our personal finances and have the business separate. 

- Security deposit transferred over with interest?         

Evidence may include:two months consecutive bank statements or electronic transfers of rental payments for existing lease agreements, orcopies of the security deposit and first month's rent check with proof of deposit for newly executed agreements.See Treatment of the Income (or Loss) below for further instructions.

Also when developers build they have to leave green space , BUT they can transfer that to another parcel in the county .

Why - servicing transfers can be lengthy and if you have a borrower paying to one servicer - if it ain’t broken don’t fix it.2.

This could be risky for them if you already transferred money out of your account or closed it.

If you don't, or can't afford to pencil in short-term rental property management, you will be responsible yourself for a seamlessly running, response intensive, hospitality business focused on your guests. 

Especially when you consider how many people transfer title from their names to their LLCs, trusts, etc.

Just to be clear on this, Gary gets the deed transferred over to him at closing?

I don't think they can do a transfer for him unless it is a joint account or the bank essentially lets them because they have shown a POA.