What about the security deposit? 

Parents had all of the money available as they had a good enough income to pay deposit, 1st month, and move in ASAP. 

Consider all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

I have a clause in the lease that says the security deposit will be held in so and so bank with so and so address and interest rate will be xyz.

Ask them if you deposit say $250k with them as MM or CD with them having control over it.  

So it was managing a risk rather than for profit.I’ll defer to others on mortgage paydown versus investing, other than to say that you may want to consider how far towards your next house / investment property deposit you are with the money instead of recast / investing.James 

I like the one that requires payments to be deposited in an escrow account:New York state law requires that consumers receive a written contract for home-improvement work that exceeds $500.

So, a $2,000 deposit could cost you $6,000 in court.Waive the deposit and raise the rent to make up for it.Back in the 90s we had a 9 plex in Cahokia, IL.

If you're living in it now, you'll probably be required to have a signed lease in place as well as proof that first month's rent/security deposit were collected in order to get a DSCR loan (they're business purpose loans and don't allow owner occupancy).

His wedding venues in Dallas all shut down suddenly recently & left many couples out their deposits & venues!