Typically, MHP management are not too investor friendly and their HOA/Park fees/rules are crippling. 

Since then, the HOA snuck in under nonpayment of her HOA fees and bought her $90k property for $3k total!

Taxes and HOA come out to $450 per month.

@Paul Muwonge - What does your lease say about City, County, HOA or other such fines and fees being the tenant's responsibility to cover or reimburse (maybe after a warning)? 

You may be able to bring that down a little since the HOA will be handling exterior issues.If this is going to be an investment, you'll need to put at least 20-25% down.

HOA is ~$425/year.

For a quick analysis, just download a simple mortgage calculator that you can plug in a purchase price, downpayment, interest rate, taxes, insurance, and any potential HOA fees.  

My current monthly is 2500 plus a 350 HOA fee which i think is too high so whenever i would get a mail offering a 1600-1900 payment and lower rates, it attracts me but then i don’t know if i can trust it.

Other liens, such as bank, tax or HOA liens are very serious and need to be addressed before a seller can deliver marketable title to a buyer.You would want to consult a RE attorney, but I guess you could either make your offer contingent on the lien being cleared or buy at an appropriate discount and pay the lien yourself.Ignoring a lien against the property is not a solution.

It is a bank foreclosure but it has a monthly HOA fee of 230.