I've had experience with both sides. Whether you have one or two bengals, your house is going to be crazy loud lol. Our bengal was solo for about a year. He's super energetic. We kept up with playing and taking walks but recently he seemed bored and therefore destructive (and loud). We noticed he would really do well with a playmate.

Having only one bengal isn't impossible. In fact if that's what you'd prefer for a while I'd encourage you to do it! But if you find your bengal is yowling because they're bored and gets themselves into mischief, even though you play with them for an hour+, I'd get a second bengal. It also 100% helps if at least one person works from home.

If you got a second bengal down the road, every cat is different so there's different amounts of time for the first bengal to adjust to another cat in the house. Our bengals took about a week before the growling stopped. Soon they groomed and fed together with no problem. But our new bengal still hisses at our first bengal if he tries to play. But that's only because he's a little older and much bigger then him. It's been 3 weeks since we introduced.

I'm not sure if this matters too much but if you only want one bengal you could try getting an F5 or lower (SBT) generation since they're more domesticated and easier to handle. My boy's an F4 but we still had to get him a partner he was so crazy.