For Sale by owner with tenets

[Jon Adams]

I am looking at a 2 bedroom home in a nice neighborhood that is  for sale by owner.  I just spoke to the seller on the phone and he told me, " he just wants out, they always pay late and I'm done with it".  He wants to put the money into his business.  My question is, if I purchase the home how do i get rid of his current tenets?  The reasons i would want to get rid of them is, well they don't pay on time, he is getting $400 per month and I think it could rent for $600 per month.  I would need to do renos. but i haven't seen the inside yet.  I asked him what the condition was on the inside and he said it is good for a rental but to live in it would need everything, again i haven't seen inside.   Let me know your thoughts, thanks in advance.  --Jon