i think thats a pretty interesting point. since this is far away from gto anyway were playing exploitive style here, which means we have to find a way to try to exploit our opponent. so i would have a look at stats like fold to 4bet, how often hes flatting how often jamming and go from there. i would only start valuebetting wider if he also jams more which most likely will not be the case so still stay with your standard range.

nono that actual plan was to cold4bet/fold TT, dont expect someone to shove something worse very often in this spot and TT still plays better in a 4bet pot than a lot of other bluffs and since we do get called quite often i also want to have good playability hands

17.30: i guess i would shove something like KK+, i think QQ is a better bluffcatcher than a jam and also balances our checking range a bit.

25:00: he should have something like Qx at least, i dont think peels that are worse are +ev for sure. even a hand like T9 which might look good concerning blockers has actually poor blockers bc blocking the straight is not as important as blocking bluffs that are trying to represent that straight

i think this really depends on your situation in life (expenses yes/no, can afford to loose a bigger % of bankroll, need for security or not, etc...). if i was a full time professional who is living from this i would be for sure really cautious, if u are having a good life already bc u dont want to risk anything there. also depends on the stakes u are playing. if u are playing nl10 u can be more speculative with your shots than when u are playing nl200 bc the amount of money is just not that big.
so i would probably pick at least 50stacks of the new stake but also can be more especially if i was living from this i would at least pick 100stacks i think. but as i said this totally depends on the whole situation.