I did mine through Indeed, but then had to juggle all the applications, interviews etc myself. It was the best way for me though because I had the most control.

When I did this it was handled via my employer. I'm self employed now but depending on your situation that may be worth investigating as the more they do, the less you have to do. That does need to be balanced with your need to stay in control of it. I find the biggest issue with this sort of situation is stopping people assuming you need more (usually more rarely less) than you do and having it become a bit smothering. That's thing one to figure out I guess. Can you tell us any more about the situation?

For quotes you could always ask agencies. Then compare to costs for one on indeed. That will be your three. Then hire yourself, to ensure you get exactly what you need from the assistant.

Or use the agency and try out lots of different people. Only issue being can be tricky to find someone permanent.

I have been through this so feel free to message