3 year upgrade at Flex seems too optimistic.
Be happy if it is anything under 7 years. Plus any upgrades to Captain will probably be only in the Phenom fleet since there are 18 year Phenom Captains going to the Legacy and Challenger for the money.
There are some guys leaving the FO position on the Challenger to get the Phenom Captain position.
Flying per year is probably 600 hours plus.
Hotels are hit and miss. Lately more miss. Holiday inn Express, Hampton inn but you can still get a normal Hilton Garden inn. Marriotts are few and months apart. Maybe 3 or 4 per year.
It depends are you looking for long term or just to get some jet PIC time and jump to the airlines?