Sounds like what happened with yours, you can easily tell by the size of the roach. 

Based on my research thus far, the SFH should rent for ^$1150 easily with each side of the duplex going for around $1000.

Using the numbers above and making some assumptions, if the Old Town condo is worth $600k and you owe $350k on the 1st, you should be able to tap into around $200k pretty easily. 

Avoid it, you won't be able to move it easily when you have title.

If it's only a clearance issue that can be fixed pretty easily with a metal heat shield between the pipe and the wood.

Spanish speaking preferred but not required looking for individuals who can easily make it to newark middlesex and monmouth county

In the hypothetical it could easily be 2 years before you're breaking even.

You both have equal rights to the title, and your land contract is probably null and void, meaning you can't get the property back easily if they default, and you are on the hook for the whole mortgage.If you have only sold on contract, then you are the owner, and the buyers have an ownership interest, and you are the "lender".

So my household income (my spouse and mine) is good enough (above $75K) to get money from hard money lender but my sole income is less than $30K/year which derives my question whether I can get financing easily considering my household income and if I have enough cash to put up front for a deal or does my spouse's name have to be on the deal as well?

Your best source of how it is done in that area would be the assessors office though, they should be able to guide you easily on how they do it.