I track our house value for interest but in 100K increments. Anything finer than that is just guessing (and the 100K bucket I expect could still be wrong). I ran the RBC calculator and do not agree with its output (and it estimates to the nearest $100 so it is written by morons and/or marketing and not anyone that understands data and significant digits). While the price they predict isn't insane, if I wanted to sell it in two months and not 12 months (or more), I'd need to price about 100K lower. Why bother listing down to to $100 if you miss by $100K? It takes your starting price and multiplies it by a growth factor. I don't know how finely refined that growth factor is (eg province wide, rate per postal code, does it change by type of housing, etc).
It's hard for reverse mortgage to be the best choice financially. Best case is probably someone with a defined time to leave (eg. already working through a waitlist for the next dwelling) and not trying to maximize estate. Assuming you own the house clear, selling the house and everything you don't need at the next location probably gets you close to 650K. What is your time horizon until you expect to be in LTC (which is substantially government funded and much cheaper for the occupant than a retirement home)? At 8K/month (plus index to inflation), your house money lasts ~11 years. Realistically, you have some other income so you aren't pulling the entire 8K out of your house money. If you can reduce the draw to 5.5K/mo, the house money lasts 20 years. Very few people live in a retirement home for 20 years. If you can withdraw 4.5K/mo, your house lasts essentially forever and you die with approximately the amount you put in.