Doing extensive repairs is rolling the dice.

Once you're done w/ seasoning then it's UP TO 80% of the new appraised value.Now w/ respect to rehab depending on what you did you MIGHT be able to get exemption and have that cost added to the purchase price.

Adding another meter base and city water meter could increase your cost to build a lot, but lower the monthly expenses. 

Also, any opportunity for adding/losing value?  

Someone bought it at the sale (if you check the bottom of the zillow ad, it was purchased last this past June) and renovated it and they're now flipping it.

I was added to my husband’s first house’s deed after we were married and at that time I was not on the mortgage (he did not know me when he brought the house).

This one was probably a little more extensive than usual as they had to basically tear it down to the studs and build it up from there. 

At this point I'm making about 1 offer every other day and I'm sure my realtor is ready start blocking my calls. 

A lot of the ads say I can just request financials, but I don't want to give them the impression that I'm a serious buyer by reaching out. 

@Ray Harrell Using other peoples money or by starting with what you can afford and adding units or trading up over time I would say.