This question probably has an obvious answer but I am asking for what you think the advantages and disadvantages are.

At my casino there are basically three different NLHE games. $20 buy-in ($1/$1 blinds), $40 buy-in ($1/$2 blinds), and $100 buy-in ($2/$3 blinds). Obviously I can make more money playing the $100 buy-in game, but I definitely don't have the bankroll for that just yet.

I started with about $500 to play the $20 game (bringing only 2 buy-ins each time I go), deciding that if I lose it I quit for a while. I built it up to $1150 and then lost a couple times, then played the $40 yesterday and lost again, leaving me at $990.

There is very little difference in toughness between the $20 and $40 games, the $100 has better players but is evened out by the fact that you get more BBs to work with.

If you managed to get through all that my question is: should I continue to grind the $20 and $40 games until I have the bankroll to play the $100, or should I play the $20 until I build up a stack of $100 (can be done in under an hour with half-decent cards) then go play the $100 game, as I could build a bigger bankroll quicker?

In answering assume (though I may be wrong) that I am good enough to hang in the $100 game.

I'm really not liking your casinos structure, is it a 20 dollar MAX buy in? Why do they force you to play low stack. But to answer your question I'd stay at 40, you said it's the same as the 20 so you should still be making money then when you get to around 2k-3k I'd move up to 100.

Yeah those blind structures really suck if your only allowed to buy-in for $20 and $40.

How do you NOT go all in basically your first hand at such low buy ins?

Yes those are the max. buy-ins. Never said it didn't suck, which is why I figured the $100 should give the tighter player more of an advantage. The one good thing that does come out of the really low max buy-in is that there are a lot of stupid all-ins, and there is a player re-buying about twice a round, meaning that there is a shitload of money on the tables and some really loose play. It is quite easy to make a lot of money is you get an early double up. I saw some guy leave the $40 table the other day with about $1500. He had been there about 12 hours I think but that is still almost 40 buy-ins.

40 buy ins over 12 hours is some stupid luck lol.

While losing my bankroll might piss me off a bit, it wouldn't much matter to me as it would leave me more time to spend with friends and family, rather than with degenerate gamblers.

thats a ridiculously shitty casino first of all

clearly move up to the 100 when you are rolled for it. don't be fooled by satelliting yourself into it, that doesn't matter at all. when you buyin for the 100 buyin your bankroll is x and is x rolled for it? yes or no question pretty easy.