You will have to pay all the usual expenses associated with buying a property: transfer taxes, government fees, title company/attorney costs, as well as a "hammer fee" which goes to the auction house.In theory yes, you could win something for a few thousand dollars.

Do you get a benefit for allowing the tenant to have the dog, such as a pet fee?

Another option is an installment sale, which spreads capital gains tax over multiple years.For unsold properties being distributed, there is generally no immediate tax event if assets are transferred at their adjusted basis.

An empty condo can be a financial drain with HOA fees, utilities, and mortgage payments stacking up.

It may be possible for the homeowner to talk with their lender's workout department and negotiate terms to pay off the arrears, penalties and late fees on a new schedule. 

@Allison Cutlip I’d choose whatever account has the most flexibility and the least amount of fees.

Plus I pay a referral fee too realtors that can be close to the commission of what you were going to make selling it traditionally.  

Quote from @TC Scott: When selling a house as you know the fees typically come from the seller's net proceeds (commission, closing costs etc.).

Usually 15-25% and they keep cleaning fee.

They provide lines of 0% credit with an 8% fee, hard money and DSCR loans among others. https://www.rammfinancial.com/Thoughts?