It sounds like you have some fixes and issues that are outside of the normal "lawn guy" or handy man category. A landscaper is a cut above - maybe far above depending on the required fix and the equipment needed.
If you hire a company - they are riddled with workmans comp and their own liability insurance and thus the price is higher - but the job could be done perhaps better and faster. There is also a track record which you can check out. DO NOT pay anybody up front, get a detailed estimate - if more work is needed, get that in writing too. If a company, make sure they are insured.
If you hire an individual, it is up to you to make sure they are reputable and can do the job.
I spend a ton on yard and landscape maintenance - the whole shebang. I have a giant yard - front and back - at least 2-acres in total. I have a normal yard guy and have for a very long time (20 years). He does all the mowing, pruning, trimming and various other smaller jobs - plant moving if not too large - I know his limits. Anything outside his normal routine (itemized) we come to an agreement on the price and I pay him extra.
I have a professional tree service that I have used on and off thru the years. They were recommended by may local Extensions service. I have a grader / hauler whom I have also used thru the years, they were recommended by my Construction Contractor ( a friend) - he (and his crew) are also my "handiguys". I also have a landscaper who was recommended by the grader/hauler and they work together on projects.
Get some recommendations from friends and neighbors. I don't use NextDoor or Angie's list -
You aren't gonna get anybody who truly knows what they are doing and has the equipment and people to get the job done anyplace close to cheap or perhaps even reasonable right now. The cost of everything is sky high. They are having to pay their workers more just to get them to stick around. Anything that uses gas or diesel has also made the price go up - even lawn chemical or fertilizers are higher.
The ticket I have found is to build a relationship with the (whomever or whatever) business or individual - they know you and you know them.
I also have a stump grinder guy, a supplier and installer of pine straw and mulch.
This is after living 30 years in the same home.
Good luck.
It's Always Something . . . . Roseanna Roseannadanna