I estimate my equity increase was between $30k-$50k immediately based on similar comps. 

I look at actual rental comps, and not some estimate from Zillow or Rentometer.

There also many unknowns like the actual inflation rate, an estimate is necessary. 

Also estimated rent?

DO you have a loan estimate?

The are always multiple variables such as: are the gift funds involvedProperty typecondition of the propertyIs it ruralTitle seasoningReservesLTVWhat is the estimated DSCR ratioCitizenship status: Foreign National, ITIN, Citizen, Resident, permanent residenceDoes borrower have investor experience or notMortgage payment history called a VOM or proof of timely paymentsGift of equity or not100% gift funds or does borrower have at least 5% down payment and their own reserveshow many acres does the property have?

I use to estimate you need 50 percent equity to break even, now I would expect significantly more. 

I would like to get a fairly accurate figures for my modelThanks much Hi Marinta,For a 2 BR unit at Beach Villas @ Ko'olina, here are some expenses:Monthly AOAO Dues:  Approximately $2200/mo and it includes:  Cable TV, Internet Service, Other Common Expenses, Sewer, WaterElectricity:  Varies but I'd estimate $200-$300/mo.Property taxes:  Around $2k/moCleaning:  Around $200 per cleanMaintenance - minimal as units are very well maintained.  

Most of the rough estimates for new construction in Houston were in the $110 - $130 / sqft range. 

After thorough research we estimate the renovation are going to cost around $40k, The ARV is around 300k.