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). 

Learn the lawsDon't use a contract "off the internet", laws vary by state and are also regulated on a federal level Learn the financing techniques correctlyDon’t skip parts of the processDon’t ever do a “kitchen table” closingUse the proper deedAn attorney can help you with the legal work, but the rest you are on your ownYour guru will not bail you out“Investing” in someone else’s deal by providing a small 2nd loan so the “investor” can pay for “cash to the seller” and for “closing costs” so he can do the deal is a very bad planKnow what problems can ariseLearn the responses and solutions to problems before they are needed Know everything there is to know about Title and what that meansKnow who a "protected class" individual isLearn the "back doors"Learn human natureUnderstand timelinesUnderstand regulation enforcement (some of these "mistakes" have a 10 year statue of limitations ( they can charge you 10 years AFTER you do the transaction) and carry hefty fines and possible imprisonmentThe court doesn't accept "I didn't know" for an answer"Know that the source of the lead plays a serious role in some states and federallyKnow how much of a "profit" pushes the boundaries to invite an investigationYou can be sued by the seller if you don’t do things correctlyYou are automatically at fault if an investigator or attorney or regulator gets involved.

They will also often carry very expensive interest rates and have other fees tacked on.