We've only had to have a locksmith out once, and invested in lock cutters for locks on storage units.5) No complaints, the more you do it the more efficient you get at it.Hope this provides some info. 

I also wonder how they got into the home if you have the only keys, or did they get a locksmith to "re-key" the locks?

You may not have a list of go-to locksmiths, handypersons (I don't know if handymen is sexist in 2017), cleaners, etc.

You can't worry that they pay a locksmith vs. a handyman.

Even if you hire a locksmith, this is $100.

Have a locksmith go with you, tenants probably changed the locks on you.

They've said that they don't keep the keys anymore since the mortgage lender called them to terminate the contract for the house right after the approval of the sale by the judge.I do have the following question:1) Is it legal to call a locksmith and to change the locks of the house and thus to enter the house?

If the seller/tenant doesn't leave the keys, we'll just open the door and switch out all the locks (which we always do anyways- The Mr is also a locksmith).We do see progress on the seller/tenant's move out, so that's promising.

Do you generally have to get a locksmith to make you keys to the house?

They paid 300 for the locksets and paid a locksmith to mortise them out.