Here are my 3 cents!
1. Get an estimate from a reputable company.
2. Get an estimate from another reputable company.
3. Get an estimate from different than above reputable company.
Once you get estimates you are in a better position to make a decision.
How much is it gonna cost for someone to come in and do the job? and how much is a saw with Personal Protective Equipment gonna cost?
Than you need to ask your self, if I buy that saw for $XXX.XX and cut a few trees, how much is it gonna sit in your garage?
Also how good of personal health insurance, do you have, can you afford a trip to the hospital? how about the time off from work while your healing up? All of the PPE in the world still won't guarantee that you will live, or if you do live, that you will live happily! What if the tree kicks back, or bounce's and takes your head off? What's that worth?
For a few trees, it seems to me that it would be better to have someone else do it for you, got any friends that have some chainsaw experience? Cutting down a tree like that would not be my 1st choice for learning on.
Shawn