Natosha - to provide some clarity, the States / Counties will not extend loans on tax liens.

Each Note will mature on the Initial Maturity Date, provided, however, that if on the Initial Maturity Date any principal or interest payments in respect of the Underlying Borrower Loan remain due and payable to the Company, the maturity date of this Note will be extended to the Final Maturity Date.

The seller is not interested in extending the closing date in our agreement, if we do not close by the agreed date originally placed in that agreement at the seller's request.

After that, we told the attorney there was an issue with plumbing and water in the crawl space and he then basically said he wouldn't let us in until we had made him an offer and were under contract, so I have no way of determining the extend of the damage, or getting inspections/bids until after we are in contract. 

I presume some of these short-term furnished rentals are more like an extended-stay motel or an Airbnb accommodation.

However, my lender tells me they will not extend a construction loan on an investment property..

These loans are often the most expensive of traditional funding and frequently used for short term durations, such as a flip. 

A faker will just get in the way.Regarding the tenant, ideally if you were dealing directly with the owner you could say something along the lines of "the contract may be extended buy the buyer at the buyers sole option until the tenant vacates

Is there any reference to the lease duration?  

I am suggesting buying shorter duration notes with a higher payment.Pay 20k for a note with 84 payments at 10% and you get a $332.02 payment.Pay 20k for a note with 60 payments at 10% and you get a $424.94 payment.Buy the above and you have a combined income of $756,96 and in 27 months you have $20,437, enough to buy a 3rd note (+332.02 a month- new income $1,089.98) , 20 months after that you have enough to add a 4th, new income $1,421 In 13 months your 1st note runs put but you have have $18,473 to put towards a new note and new income will be $1,328.08 with 24 months left on the original 84 month note so you should be able to add another to the portfolio before that one runs out.Note there will be bumps along he way but you will own a portfolio of notes that are well secured relative to the value of the underlying real estate.