Right now they have some cute but a little wild boho looking curtains with orange, teal, gold, black.  

Without knowing any of your financial position of your work or side hustles it is hard to give you exact advice because you may be able to carry these homes until they are paid off and in that case they would provide solid returns, but there are likely better real estate investments out there.  

I had a chat with them on the phone as i was curious about the funding.. but came to the conclusion that the down payment ( the client made to buy) was probably what they paid for the property and the seller carry back note was the profit.. and then the seller carry back note is sold to yet another investor.. who is investing for coupon money.   

If you are on cash accounting, yes you could do that.On the other hand, you are ignoring carry-forward losses. 

I carried double the cost on Gas and Electricity to be safe. ==== Projected Income ====**Off Season**-$4,000/Month Rent Period: September - May (7 Months) Projected Income: $28,000**Summer 1**-$8,000/Week Rent Period: June (4 Weeks)Projected Income: $32,000**Summer 2**-$8,500/WeekRent Period: July-September (12 Weeks) Projected Income: $102,000**Optional** (Basement Apartment)-$2,000/Month -Rent Period: Year Round Projected Income: $24,000TOTAL PROJECTED INCOME: $186,000 ==== Operating Cost ====-Mortgage: $84,000 ($7,000/Month) -Utilities: $36,200Gas $6,000 ($500/Month) Electricity $6,000 ($500/Month) Internet $2,400 ($200/Month) Garbage $5,000 (Estimate) Pool $4,000 ($250/Week)Landscaping: $4,000 -Mowing: $2,400 ($150/Week)  -Clean Ups: $1,600 (Spring & Fall)-Weekly Turnovers: $8,800 ($550/Week)==== Legal Cost ====Summer Rental Fee: $20,100 (15% of $134K)Sandwich Rental Tax: $6,855 (15% of $45,700) NET PROFFIT: $38,845.00

But they'll also get the stop up costs basis too.Well if you aren’t selling anything then you won’t need to worry about depreciation recapture.Yes, whatever you don’t use gets carried forward.

HELOCs carry higher rates than cash out refis.

Factor in carrying costs (utilities, taxes, insurance).2.

If the property is not cash flowing and is due to your mortgage carry, it will most likely require a cash buyer to work (or close to it). 

Unpopular opinion since I know you're trying to buy the next property, but keeping your equity in a deal is gold.