For me, a large part of the fun of playing Limit poker is the large stacks and the number of chips in a raked pot. However, one important consideration when determining the number of chips for the limit is how well the players in a particular game manage stacks, pot, splits, etc. If not too well, and too many chips are used, the game slows down significantly.
So, my preference, for either a home game with no dealer, with experienced limit players or at a casino:
Antes (ante games) = 1 chip / player
Bring-in (Stud games) = 2 chips
Complete (Stud games) = 4 chips
Small Bet = 4 chips
Big Bet = 8 chips
For home games with no dealer with players not used to manage large stacks, I would go with:
Antes (ante games) = 2 chips / single player
Bring-in (Stud games) = 1 chip
Complete (Stud games) = 2 chips
Small Bet = 2 chips
Big Bet = 4 chips
Using only 1 chip / 2 chips for the limits takes away some of the fun imo. And creates issues with Antes, Bring-ins and Completes. Now, is it doable? Yes, it's doable. For games like $3/$6, $6/$12 or $9/$18, 3 chips / 6 chips is fine but small changes on the Antes, Bring-ins and Complete would have to be made.
Regarding the number of chips, For 2 chip / 4 chip games, at least one rack per player plus value chips. For 4 chips / 8 chips games, 2 racks per player plus value chips. For something like a 3 chip / 6 chip game, I think one can get away with one rack per player plus value chips.
If the game is Stud variants only, and that might be the only occasion, I think I'd be fine with another chip in play for Antes only if the game is 2 chips / 4 chips. That chip would be 1/4 or 1/5 chip. And again, for antes only. Not my preference, that's for sure. The only thing it avoids is the single player ante, which is not an issue imo.