Among the groups bidding on my properties, how many were using bridge debt?  

I recently bid on a house the had sold for 115,000 and was held by an LLC.

Had someone recently bid $2000 on a $25k performing loan.

Especially outside expensive coastal cities with almost comically bloated housing prices, the biggest issue for homebuyers isn’t the down payment—it’s affording the monthly mortgage payments, especially with interest rates where they are.By throwing money at the demand side without addressing the supply side, the most likely result is just to increase the price of properties all the more, as prospective homebuyers with $25,000 in government money behind them bid up prices against each other.

I can't speak for Tampa, but back in the day for Los Angeles County there was a minimum bid at the auction at the courthouse steps and then it went up from there.

Failure by the Buyer to so notify the Seller and/or Seller’s Broker in writing, within the calendar days, shall constitute an election by the Buyer to proceed with the transaction.As @Nathan Gesner mentioned, an estoppel agreement is a great thing to get but I have rarely been able to convince a seller to get that from their tenants during a purchase and you could put yourself at a disadvantage when bidding on properties by requiring the seller to get this

If I were to purchase a property at the auction that is foreclosed for first mortgage but has code enforcement liens, will the code enforcement liens go away after I win the bid and pay off the mortgage or do the liens stay on property and I am responsible for them?

I’ve been in multiple bidding wars for clients.

Most of the properties get bid up. 

If you do not, you may get bids from contractors that can not be compared to each other because the contractors have a different view of the quality of work or materials you envision.