don't worry about securing a mentor. 

Here's how you can structure it:Contingency Clause: Include a clause in your offer that states the purchase is contingent upon securing a lease agreement with a tenant within a specified period.Time Frame: Define the time period within which you need to find a tenant.

What damage could it possibly cause that their security deposit wouldn't be able to handle, worst case scenario? 

S8 Challenges:1) Voucher holders not having funds for application fees or security deposits2) Tenants trashing properties, killing ROI3) Tenants not paying their portion of rent or utilities4) Tenants not cooperating with ongoing S8 requirements or inspectionsAlso, you stated in your initial post that you'd be buying turnkey rentals.

We were unable to secure offers within a reasonable price point.

I am looking for advise .We want to move away from security deposits and charge only Move-In Fee.

Here's what I was thinking...Can I ask him for a deposit to hold now that will then be used as his security deposit? 

Nonetheless, the "1% rule" is a widely accepted guideline.

Now if this is a full 6 month MTR then yes, I would change the lease dates a week to secure the booking.

It will also detail other various impacts such as traffic, security etc..