The response I received from Tardus when I asked about this was "we can help you make adjustments" but unless they can replace my income, I really don't see how the patented calculation can replace my income (unless you are already at the tail-end of the snowball).I am truly happy for the people who have tried it and have had a positive experience to date.

Labor/material are going to be different and need to factor that in4) new roof, new HVAC, new water heater, ac panel, replacing plumbing to PVCThese are very variable, if you are getting this from a licensed guy to do it and unlicensed.. is it a big shop or a local shop doing it, is the GC doing it they will put some money on the top so it will be more money5) framing (creating new bedrooms or baths)I would get all these quoted from a good couple of licensed guys and unlicensed to know your numbers to cents

If separate, do they both need to be replaced?

If you're curious - read it here: https://www.biggerpockets.com/forums/51/topics/1221700-rant-...In closing: The dangers of shifting the timing (of your income, expenses, and business transactions.)A purely mathematical exercise may indicate some beneficial timing for this or that.

I requested money from the guest for replacement and contacted Airbnb in the meantime, and the guest left me a bad review because I requested them to pay for it. 

Be ware of the ones that get compensated on the back end by trying to refer you to replacement property solutions that compensate them.  

Replace rear siding but not the other siding.

Some questions I have.1) Do you make enough from your houses that you can not only replace your income but also make enough that you can continue investing in real estate?

Idealizing a past scenario is purely negative.

They usually do not have these figured out, I mean sure, everyone wants to 'make money', or ' own 10 properties in 3 years', or (my favorite) 'replace their W2 job in 5 years'.....but they have not thought any further than those basic (and misguided) goals.