I have a dated house I'm having the doors and trim panted and I was wondering if its beneficial to replace the dated door knobs to the bedrooms/ closets?

The doors and trim are slightly darker wood and feel slightly dated but are in really good condition. 

If that doesn't work, remove the trim from the top of the frame and install a 2-3 inch screw through the top of the door frame into the framing above. 

What about raking and trimming trees back or weeding gardens?

That said here's what our numbers look like, we think we're being conservative on the costs:Age of House: 1987Offer: 100kARV: 160KRent: 1350/monthRepairs: 35K (worst case - expecting less - hard to say since this is our first go around)master bath needs fixed, guest bath just needs a good clean, flooring in the entire house needs replaced (guessed 10k alone for that), fresh coat of paint, tree trimming/removal as they're very close to the houseAppliances - original but seemingly alright shape, original hot water tank (OLD)the good: brand new roof, brand new AC unitWhen we did the numbers we worked in possibility of having a management company (10% of our rent), maintenance costs + vacancies (about 12% of our rent), with 20% down the numbers come out to be around 300 cash flow. 

I do go expensive on the baseboard and trim.

Plan on pressure washing entire building, fixing any loose/missing vinyl, paint window trim as needed , paint foundation slate grey, repair handrails ( paint white) , paint all 4 doors black, and add modest landscaping to improve the outside appearance of the property TOTAL spend budgeted $10,000 for Repairs/ Upfits DEAL DETAILS: Purchased through a brokerOriginal asking price was $130,000 we were able to get it under contract for a $110,000 cash offer because another person who was trying to buy it kept it under contract for 3 months and the owner was ready to close fast.

I would probably match the deck to the house trim or in a Cedar color.

You will see a very large discount in finishing goods like flooring, trim, doors, etc.

If a roomer's pet is destructive you can talk to them about it immediately instead of after 6 months of destroying your trim, for example.