i agree with ace but its also personal preference.
Sounds like youve put some work into it already so dont ditch it. you might just fond that you'll look at every 6 months not weekly. It would be useful for seeing cashflow and CF+or- after all assumptions and once you know some actuals once...
I think that all sounds very hard!
I think looking at comparable properties to see what its current value and rents are sitting at and if you have access to more equity or if rent needs to be increased.
keep an nice excel sheet with purchase price and current value along with some...
