I’ve done a bit of research but don’t know where to start to apply these.I have enough capital for 4-5 down-payments, should I be transferring these amounts to my old Canadian bank account before getting pre-approved before receiving a loan or I can do everything with my overseas bank account if the loans are cheaper here?

I believe the 'fair rental days' data is needed for something completely different (i.e., the ratio of days rented vs. personal use).https://www.irs.gov/publications/p527#en_US_2018_publink1000219036The IRS link above clearly defines when a property is ready and available, which is measured differently than fair rental days. 

There's several things that are trying to create data like you're looking for, but the above way is definitely the most reliable.

@Joe CasizHere’s some sources for market researchZillow and Redfin for historical sales dataDriving the neighborhoods and attending open houses The US census for income and employment data etcMunicipal website for list of employers

Feel free to reach out for specific area market data / trends or a price opinion.

@Leah Roberts I am not a lawyer but my understanding is a land contract title does not transfer until all payments are made.

Primary residence portion - Because you're forced to move for a job transfer you'll be able to take a prorated amount of the gain tax free. 

@Shaun James i know i realize it on the last minutes , them i find someone the last day and we ditting agreed on number , thank you , anyway how is the paperwork to transfer or sale it to someone else fast 

Also, though 10-16% isn't terrible by any means, once you start getting that balance paid down and you see a little bit of a boost in your score, consider balance transfer cards with a lower rate.

If you can't get a zero-interest credit card, get a low-interest balance transfer card, put the replacement on your regular card, and then transfer it to the new card.How many times do you think he's googled "freon leak" or talked to his other tenant friends and reached the conclusion that you're just an awful, cheap landlord witholding what he's paying you for?