Renters paid every month and then when they were done with their 6 month lease I went to go do the walk through and the house needed a ton of work and all new appliances.  

I.E with the kitchen cabinets could I just get new counter tops and cabinet doors without all new cabinets?

But what about things like knocking down walls, building new ones, window replacement, kitchen remodel, etc... do i need to hire contractor with a Construction supervisor license?

It is an older home built around the 1950s and is need of updates new kitchen baths paint flooring possible electric and plumbing issues.

I have upgraded the units with things like luxury vinyl flooring, clean surfaces painted with good colors, good but non fancy kitchen cabinets.  

You mentioned it has been on the market a while - is the roof/furnace/appliances/water heater/etc etc nearing end of life?

Other thing is their is few cabinets in the kitchen....not much storage in the kitchen for a 3/2.....Here in California potential tenants always like to have lots of cabinet space.  

It may need a roof, lots of paint, some new kitchens and flooring.

Obviously, some of the capital expenses like roofs, furnaces, foundation, etc. can sway things one way or the other in a large way, but how about an entire remodel for a kitchen that has bad cabinets?

I'm thinking I should be able to get it done for 20-25kNeeds sheet rock, some insulation, plumbing, all Appliances and cabinets, im thinking laminate flooring. 8 new windows.