Some owned are inside ROTH IRA'S so I will never pay or owe ANY tax or capital gains on the profits.Some are 1000% tax free profit, before adding in the accumulated tax free rental income, If you finding better investments, I'd love to hear the details.I tried to use a financial calculator once, it just got real hot and burst into flames.

You can lookup the tax rate on the county assessor website - Make sure you are looking at or calculating the property tax WITHOUT any exemptions (since you’ll not get any as an investor). 

One set of screenshots is from an Excel template the other is a biggerpockets calculator. 

HOWEVER, on that note, just because it does not report on your credit DOES NOT mean it is non-recourse and therefore it DOES count towards your DTI calculation in most cases going forward.Off my side tangent, a true non-recourse loan is any loan that does not have any kind of personal guarantee. 

Or am I doing sny wrongI'm using the BP calculator

Although we weren’t changing the exterior, we were asked to provide a survey of our property, elevation drawings, stamped FAR calculations, and sat in front of the city councils to obtain an approval (the special permit).

Pymt: $2,668Your calculation: https://www.mortgagecalculator.org/?

Start by calculating the percentage of your rented home, typically based on square footage.

Make sure you take advantage of the various resources (books / team builders / calculators) while you learn and get ready for your first purchase! 

Definitely reach out when you get closer, I do a lot of new construction dealsInitial Assessment Based on Land Only: In the first year, property taxes may be based primarily on the value of the land, as the construction may not have been fully completed or assessed by the time property taxes were calculated.