As far as a multi, personally if all things were equal I'd go for the multi for a few reasons.  1) Added diversification.. if one tenant doesn't pay, you can still cover property expenses with the other tenants 2) Shared capex... typically, one roof and one property to maintain but multiple streams of income 3) Less vacancy.. usually multi's rent for lower, for example one of mine is the sweet spot of 3 bedrooms for $1300. 

The building has a flat roof also so the attic units would not look much different than the lower units.

how would i know which issues take priority over others (i.e. replacing roofing, fixing plumbing)?

My guy said it's being over run with rats which leads me to believe that it probably needs both structural and cosmetic work, inside and out - although from pictures, the roof looks good.

give me property info about [address, city, state, zip]what would be the cost of a new roof, kitchen, updating, and new hardwood flooring for [address, city, state, zip] based on square footageWhat Zip Code in [city, state] has the most cash sales per thousand people?

get an umbrella policy to protect yourself, see if you need a rental license in your municipality. an LLC is only for insulating you for liability and anonymity, it will not save you on taxes and you really dont need to worry about it with one property imo . you cant protect a single property from lawsuit, insurance is what covers you just make sure you’re up to code. insurance will always look for a way to get out of covering an incident.if you register, you’ll want to report the income. if you make less than expected after deducting costs, then it’s time to raise rent. you wont be able to reduce more to reduce other income streams since you're not a full time real estate investorin the future if you ever sell, because it’s a rental now you will owe capital gains on the property. philly is probably like ohio and not california with it’s YoY growth being tied to inflation. with that said your profit is mainly going to be the equity you build from your tenant paying your mortgage. the money earned monthly should be saved as youre doing in case you have a capex repair/replacement come in like HVAC, roofing, etci advise you pay for an hour to speak to a CPA to better your options.good luck

I added a new roof, updated the electrical, added a new boiler, installed air conditioning, and refinished the original hardwood flooring throughout the house.

I do know a number of the roofs need to be replaced soon.

It's not possible to answer the question without defining the scope of what you want...a swim spa style system craned in over the roof could be a couple weeks if it's in stock and can be delivered ASAP...then you just complete decking and landscape and it's finished.

I had 12 solar panels and a new roof installed.