These two contractors may not like that area, or just had one bad experience, so it would be great if you could explore more of what other experiences people had/have in the city. 

It feels like 10K in PA is equivalent to 2K in NJ.

It would be great to have something like that.  

Quote from @Michael K Gallagher: Quote from @A Rao: I invest in land and have done entitlement/zoning and other DD work successfully for years.A broker called me this morning on a property I have on a busy interesection and has a QSR client who likes the location, but does not want to do a ground lease, only a build to suit. 

Hey @Guang Yang, no need to use any kind of extra stuff for a single unit like @Patricia Andriolo-Bull said.Just use the built in tools on VRBO and AirBNB and you will do just fine.

A great place to start is https://www.biggerpockets.com/meet which you can use to find like-minded people in your area and every other market across the nation that you may consider.You'll find some helpful tips at https://www.biggerpockets.com/starthere.For tips on how to get the most out of BiggerPockets, check out: https://www.biggerpockets.com/rei/biggerpockets-com-tutorial/The BiggerPockets Keyword Alert System is an awesome tool: https://www.biggerpockets.com/renewsblog/2012/12/1...See you on future threads!

Central location works best like you want.

Also seems like a lot of MF sells occupied with tenants in place so you just have to comfortable with that and contracting up from and seeing inside after contracting.    1st step is to find a great lender and get pre-approved for a loan so you know what your budget is. 

Like what would the keywords be for it to be legitimate? 

Rather you like it or not we are all much more scared of a lawyer letter than an email or a note from your landlord.