ISO Hash, possible improvements

I'm want to know a basic run down of the procedure for the best way to make iso hash.

here is what I got

I Have a 16oz cup full of dank weed that got vaporized and is now lacking potency. I have a bottle of 91% rubbing alcohol.

I was wondering if it would be better to boil or reflux the ISO/plant matter.
- My initial guess is no because when the temperature of the solvent increases its going to dissolve more junk that you do not want in the final product

i was also wondedring if a non polar solvent was used to perform a wash on the plant matter, prior to extracting the compound with a polar solvent?.

what would happen if one were to attempt a recrystallisation?

in other words, the main idea is what can an individual do in order to successfully accomplish an extraction on plant matterial
while being less crude then the crude iso extract.

How long are peopls letting the trimmings soak in the solvent for?
and like... what temperature

Butane hash oil is SOOO much easier and twice as potent.

is butane easy to use with small volumes of plant matter?

i think it would be more effective this way

Yea, butane is probably the shit but here in sweden it is probably cheaper to buy a big shunk of maroccan hash than all that butane gas.
So whats the THC/$ ,butane compared to isopropyl?