Since you are small, have a tech AI your cows in the beginning, while you learn to AI & improve your own technique.
There is some expense involved with AI, but the genetic progress is quicker and you don't have to mess with a bull on your property.
The expenses are:
AI School, semen tank ( consider used ) AI breeding kit and semen.
Beginners use alot more semen until they get better at AI.
If you buy a bull, get the one that best acomplishes the goals you have set for your herd. Don't skimp on cost. There is a formula to figure out how much you can spend for a bull.
I don't have it on hand, but am sure someone else has the link.
Ours comes out to $2,000. We have spent more when needed.
If you don't want to take care of the bull in the off season, then sell him.
For the past 2 years we have sold the bulls we purchased, right after the breeding season, so we don't have to deal with them through the winter. Got what we paid for them and
don't have to take up feed, labor and valuable barn space for another 8 months. It is costly to keep a bull for those extra 8 months, especially in the snow states, when he isn't being used and the damage some of these penned up bulls do is significant.