There is an interesting thread on one of the forums I read about what power tools are essential in a hand tool shop. Of course history proves none are really essential and I can definitely imagine not having any. The lists vary but many of them include a bandsaw, a thickness planer and a drill press. I'd add a cordless drill and call it good.
It's not that you have to have any of these tools. If I someday have space limitations I will do without them, but they are nice to have.
I have begun reducing my power tools. Last year I sold my tablesaw, a major step symbolically and substantively. I won't say that I never miss it, but I am getting along just fine without it. The chopsaw is next. I have a miter box. The tailed jointer gets used very little, isn't necessary and, at 6" wide, is very limiting anyway. However, I use my bandsaw all the time and would really hate to be without it. It would be the last power tool I parted with. I would really like to keep the thickness planer. The drill press is convenient.
I keep looking at the router table. I'd like to get rid of the screaming beast but the step to the hand tool equivalent is a really big one if you are going to replicate its functionality. I purchased a plow plane, a router plane and a shoulder plane and use them regularly, so my use of the router table has declined a lot. The three of them together cost a whole lot more than the router and table. The thing to do next is purchase one hollow and one round.
I don't look forward to sharpening them. Truth be told, the major impediment to adopting hand tools for me is sharpening. Sharpening really is a gateway skill. Chisels, planes, scrapers, spokeshaves, handsaws . . . all demand that the woodworker be able to sharpen. This is very unlike power tools where you use a blade and throw it away or can send it out periodically to be sharpened. I've gotten reasonably good at sharpening straight blades in their many forms, have a good beginning on sharpening handsaws and am turning to curved blades.
Ironically, many hand tool woodworkers rely on power tools for sharpening. There's definitely an argument for them; I bought one and use it periodically, but it's not a silver bullet. I tend to think you should sharpen your hand tools with hand tools, but that's just me.