Is it time to Evict my tenants???

[Peter Goeller]

Hello BP about a year ago I bought my first house! its a 3 family in Lancaster MA. It came with a set of tenants (a middle age man, and a middle age woman and her boyfriend) who have been decent.they do pay but it has been late I usually get it on the 5- 10th every month.this month I have not seen It yet its the 13th. another thing I should mention its heat and hot water included and they are paying $500 below the market rent. should i evict them and find someone who can pay on time and the market rent? should I try to jack the rent way up on them? they are Tennants at will.