Points to consider:
1. Foreclosures require a public sale. Typicaly the bank is the high bidder because the loan amount exceeds the value. This sale process will wipe out junior liens but not liens such as real estate taxes. If you ten buy from te bank make sure the deal requires them to eliminate all prior liens and pay usual Seller closing costs.
2. If the bank arranged for the borrower to deed the property to them ad they will sell to you, junior liens are not wiped out. Make sure the contract requires this as well as unrecorded liens such as building violations.
3. The cost of acquisition is only part of the issue. How much and how long will it cost to get the place up and running as well as overcoming the bad reputation from the prior owner.
4. Prior owner went belly up so any info you get from them will be meaningless. How much did they forget to report. How much should they have spent on
marketing and maintenance. How much business should the place have donme if run properly. IS it possible for the place to make $ due to external factors such as location, location, location, overhead.