But, it may still be a valid deal for the seller and the buyer without an agent inolved.Here's the thing, anyone that limits their investing to "Subject To" only, is foolish and wasting opportunities.

However, still valid and important considerations to make as I continue to evaluate options. 

If your in a very cold environment you can have a gas furnace in your HVAC system. 

The owner and/or a lienholder has one year to challenge the validity of the tax sale.”

gas meter?

Our ADU is separately metered for gas, electricity and water. 

Anyone use submetering for Water gas and electric in Denver?

Given you aren't clearly a prorata split of everything (IE both names on title, mortgage, etc), Partnership treatment would be much more supportable than as a TIC.If you have an agreement in your JV that you are sharing the expenses and revenue of the venture, the JV certainly gets to claim those valid expenses, including the mortgage interest.If the property was never in service and was being renovated, that interest may not have been deductible anyways and it is possible it could have been required to capitalize it into the renovation, in which case you'll recapture it by your share of depreciation.

Being able to enter all expenses, mortgage, mortgage interest, sewage, water, security , gas/electricity , cost segregation study to depreciate it  over 5,7,15 years as opposed to the 27.5 years. 

Why not invest any non-IRA dollars in oil and gas and get the 100% deductions to apply against your Roth conversion tax liability ?