They will not care where the money comes from, but most foreclosure auctions require you to open an escrow account and make a deposit in advance of the auction, then settle up almost immediately if you are the winning bidder.

Can we say we are entertaining offers starting at "X" for a certain time frame (90-120 days or so) and require a percentage of the offer for a deposit. 

  $2500 security deposit.  

If the Sellers are tight on money, after you have released all contingencies, you can authorize the escrow officer to release your deposit to the Sellers early so they can use the money to buy out the tenant.  

Think of 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 want to almost forget about them, until I see the deposit made in my account, or until I realize they have appreciated so much, and I need to consider my options.

Festivals, college graduation, fishing tournaments etc.I adjust my price through out the year based on demand, events, and time of year.I have accounts at Homeaway (also searchable on VRBO) and AirBnB.Homeaway and VRBO blows away the bookings I get on AirBnB for vacation rentals so I would use the data from here primarily.You can also check local Craigslist ads  for properties similar to yours to see what their pricing is.Also look at their requirements for security deposits, pet fees and cleaning fees to she what you should be charging for these also.Once I started getting reviews on Homeaway my calendar started staying full.I charged on the low end to get more reservations in the begging and once I had several 5 star reviews then I started charging on the high side.

I do not have physical proof of depositing money before 2007.  

Then the tenant files you with a lawsuit because her "property" is damage and you now have to spend the day in a lawyers office giving a deposition.

Nothing like rolling into your bank and having to put down a deposit to get a secured card with a limit like a college kid.