Besides facebook and craigslist....what are the best sites to attract the right buyers for this product?

And a salesperson who doesn't want to sell is going to have a tough time. 

your best bet here is to find a professional that knows the area, product and market you are selling in.

Multifamily is a tough business when it comes to sharing commissions.

Since you don’t need cash flow from the house to survive, you can easily do 7/1 or 10/1 ARM product to save on interest cost and get your money out My two cents

Pros - Higher rents than renting to a family, I can pop in anytime to check on the place, if one guy moves out, I don't lose the whole rent, no wear and tear from kids or pets.Cons - Higher turnover (I usually do month to month which also has higher rent), potential for parties (but I screen very carefully so this has not been an issue at all), parking, roommate drama (rare with professionals).Just another option to consider.I'm a mortgage lender myself and I wish we had a 90% product like that MACU loan!

How tough are y'all non guests that leave the home a bit of a mess? 

There are commercial products out there with 30 year amortization to help keep payments low and you can cash out between 70-80% LTV.To answer part of your other question. 

No need to worry about what interests rate will be in 5-10 years which is an issue with a commercial product.

NJ is a very tough place to loan money from the lender side of things.. foreclosure time lines are for ever.so I don't think your being realistic on what you expect.. but I know Patch of land has done a ton of NJ loans. you can go direct.you need more than 20% cash into the deal.. in most instances in a state that is so tough to work in.credit while important is not the main driver in HML.