What your saying isn't an arms length transaction. 

When a tenant moves out, transfer the deposit back to Checking so it's ready to apply towards expenses or refund the Tenant.If you end up with excess funds in the Checking account, I recommend you transfer it to a third account designated explicitly for future investments.

To what point is strong-arming way into property?

Because dealing with tenants is like an "Arms Race".

Hard money will charge you an arm & leg (additional points, high rates, etc.), but they'll get you the leverage you need.

i say that not to discourage you but to arm you. 

Make sure it explicitly explains the process for termination if you are unhappy with their services, especially if they violate the terms of your agreement.3.

Yes, Fannie Mae does have a multi-family lending arm, starting at a lower limit of $1M for 80% LTV.

Unless you have something explicit in writing that they permit you to move forward, I'd hold off.Consult with counsel.

However, future rights can vary.Key Lease Terms to ReviewTo determine the specifics of your lease, look for the following clauses or terms in the lease agreement:Assignment and Subletting:Check if the lease allows for the assignment or subletting of the tower space to new carriers.Look for language such as "the right to sublease or assign" or any restrictions on adding new tenants.Scope of Lease:Determine whether the lease explicitly states it covers only the equipment and tenants present at the time of the agreement.Phrases like "existing tenants" or "as of the date of this agreement" can be indicators.