The property is going to cost me 25k and needs another 30k to make habitable .

Make it a habit to go to meetings.

You mentioned letting the current tenant stay for a bit - that was my original plan when looking at this house, however the idea of getting into a situation of habitability complaints vs what could be painted as retaliatory eviction spooks me a bit.

My idea of that is to buy a property first regardless of the condition as long as it is minimally habitable, live in it as is and repair it along the was as quickly as the OP can afford, and eventually have a property worth much more than was paid for it.Some investors might disagree with that and wish to have a property that is in a more upgraded appearance. 

Make sure you sit down with your real estate attorney and CPA because they are a vital part of your business.

Do not poo poo the leaning of the legal side of real estate this is a vital part of real estate for both agents and investors. 

@Ibrahim Hughes, are you in the habit of speaking for other people?

There were pictures on realtor.com, and it showed that a lot of rehab will be needed just to make it habitable.  

@Tammy Vitale thanks for the comment, you said you were always a investor.

Not only a personal, real-life mentor, but also the great authors of such books as 7 Habits of Highly Effective People, Think & Grow Rich, and How to Win Friends & Influence People (to name a few).