I'm wondering if some one can help with an explanation about why a Hotel has many rooms with tax lien on auction? 

Can provide all the benefits from a cash flow and tax perspective.

That's $1,600 per month plus to pay debt, plus at least $400 in taxes and insurance.

Worse case I just continue to manufacture them through my fix-n-flip business and buy with seller financing where available.Also, is tax lien investing really viable today? 

You can expect that you will be required to build roads, sidewalks, storm water control, utility taps, street lights, street trees as well as recreation fees as part of the development process. 

BRRRR, Fix Flip, taxes, deal analysis, market analysis, marketing, financing, etc.  

With an 8% mortgage rate, they would pay more than $650k in interest.One major problem for both buyers and owners beyond mortgage rates is the rising cost of property tax and insurance.

Assign a contract: This is where you get a property under contract and you "fee" that you collect at closing is for giving the end buyer the rights to execute on the contract.

He's created an army of loyal bots that do his bidding and he's probably made $60 million or more just in membership fees.

There are also tax implications.