Change windows in renovation

[Sherwin Vargas]

I know it has been asked before but i was hoping to hear from local people in Rhode Island -providence area. 

I like to give general information because i know I would be interested. Question at bottom 

Currently renovating a 3 family we bought back in Sept/Oct. Bought appliances for all floors. 

We did the minimal on first to get rental($2300). 

Did some small upgrades on second(laminate floors, paint, and bottom kitchen cabinets, counter  $5000). Completely redoing 3rd floor 

3rd floor needs everything complete gut. Kitchen bathroom dining room. Heating system floors. 

We are almost 20k in, atleast another 8k will be spent. We are out of money with that final 8k. we only expected to spend 15 to 18k. We didnt know the extent of the rehab as its our first and didnt research much. 

 My question is since half of the apartment is being renovated should we put up new walls in the bedrooms and living room and replace the windows (10) and insulate those walls if it will all be going on credit cards. Estimated cost 5-6k we will be doing alot of work our self and our contractor will replace windows since hes doing all the other work for 50 dollars each. 

Is it worth it for a rental. The windows are wooden single pane original windows. The bedroom walls in decent shape. Living room walls look very lumpy.

Silver springs area comps dont seem too high looks like we could get 1200 to 1300