You will find that it will cost around $1800 to do the required asbestos test, secure permits and do the tear down. standard 2 car garages with pad run around $14,000, plus or minus.

The owner of the company replied to me after I negotiated with my seller and informed me that in order for a wholesale transaction to legally take place I first have to close contract A with my own money, a lender, or transactional funds before I can close my assignment contract.

. :-)  It sounds then like realtors (under NAR, etc. guidelines, nationwide...) are likely 'unclear' about a "non- transaction" (and that clause clearly only refers to "commission sharing" in reference to actual "under contract" clientele) and likewise my either 'promising' or 'gifting' (in effect) money or perks to someone who 'refers' a potential client they can't work with presently (when I can help that person, who may then become a RE brokerage and/or mortgage, etc. client later on, when they resell, or perhaps refer others they know, if the agent(s) HELPED THEM OUT) doesn't even seem 'grey area' to me, unless there's more 'legalese' (statues, legal precedent, case law???)

If concerned with legalities (many are not) see 475 to avoid problems.

Their lease says they must inform me 60 days in advance if they want to move out or renew, and they already said they wouldn't renew.The question is, do they have any legal grounds to stay?

I would obviously like to get my tenants secured and locked up in writing as soon as possible but issue is I don't have formal land use permits as of yet nor have I started the process - all I know is that QSR/coffee shop/drive thrus are allowed according to the zoning code.

They will also help you avoid any legal issues that may arise with paperwork, tenant screening, and rent collection.

Any legal issues you can think of?

The rebate must be listed on the CD by the buyers agent.Rebates are legal in most, but not all states:  https://www.justice.gov/atr/rebates

If you haven't already, speak to the local planning and building department to find out what you can build on the land, what the process is for permits, and what is needed from you to submit for permits.