You will also need about 6 months of reserves deposited in a traditional financial institution rather than a crypto account.The next step is to find the target property and calculate the acquisition costs and costs of construction along with the after-repair value. 

I mainly want to ask if these assumptions are reasonable and if there's anything I haven't considered:(1) multifamily units in NJ close to New York City, ~$1,000,000, 20% down payment, (2) Using the following assumptions: 4% appreciation rate, 6.5% interest rate and 5.0% refinance after 5 years, $10,000 yearly maintenance fee(3) ~$6,000 monthly rental and assume 3% increase yearly with 5% vacancy rate(4) Based on the above, the calculated IRR if selling at the 10th year is ~19% (considering tax benefits) and ~17% (without tax benefits).

The 1% rule is best only used as a quick and dirty evaluation used to pick which property you plan on running additonal calculations on.

There is an app you can download called EZ Calculators that may help you somewhat.  

How do you calculate the ROI of your amenities to say these are the best amenities for ROI?

Nonetheless, you can base the DSCR calculation on PadSplit rent (if there's a history of PadSplit income being produced) or short-mid-term market rent (an analysis done at the same time of appraisal).

BiggerPockets also has a calculator to analyze deals, and I highly recommend you start this as soon as possible, even if you are not ready to buy.

I am putting in a link to something that may be help, a cost of living comparison calculator (https://www.bankrate.com/real-estate/cost-of-living-calculat...). 

Obviously, the most important focus is on those who experienced loss of life, need rescue, and experienced total loss; again, my heart goes out to those people.From an investment standpoint, hurricanes are obviously a real, calculated risk of the area. 

Hello, it is really time consuming for me to analyze each property by manually entering its data to calculate the return.