You don't need to wash interior walls that are new and clean.

Learn how to edge in properly vs using painter's tape. I wouldn't let college kids do this.

Right. Why wash walls? Why are you repainting? Why not have it done by the builder?

Do you know what you are doing or are you just winging it?

No ceilings? No trim?

Closets?

9' ceilings means moving a ladder. Or a scaffold if you have that.

What are the "college kids" going to do? Roll?

Give yourself a solid month. Can't say for sure without seeing the job, your capabilities, the tools, or the help.

Thanks for your replies. Most of your questions can be answered with a "because I can't/won't pay $7,000 for a painter to do the job" (which I was quoted from 2 different painters). I'll have the tools, I've painted before, was really hoping someone who has done something similar in the past (walls only, no ceilings, trim, doors, etc.) would know an estimated total # of man hours. I'm guessing roughly 100 man hours.

I would figure a room a day alone.

That foyer will be a big PITA.

The speed is HIGHLY dependent on skill. I have done a 4000sqft house before. I was much faster at the end than the beginning.

I paint my rental properties, 7 rooms, in 2 days but only 1 coat. I do all the cutting in all at once and roll all at once.

It typically takes me 75 mins to cut in a room and 40 mins to roll a room per coat. Stairwells are a few hours alone. Ceilings are another day too

I use a 2.5 inch angled brush for cutting in and a microfiber roller. If you are using all the same color, buy a big roller bucket that you can dump all gallons into. It is wheeled. For stairwells, I have a short standing ladder At the top and a tall ladder leaning against the stairwell wall. I place a 10 foot board between the two and walk out to paint the high parts.

I would not use college students. The rolling out is the easy part. Very Zen.

You will lose a lot of time, which you will not recover. You have a high chance of a total failure if you do not have experience (as I happened XD, a long story). Honestly from my own experience I will never be able to waste time on something I'm not good at when there are so many care professionals doing their job well at a reasonable price. I have been using the services for some time https://www.paintingservicesingapore.sg/house-painting-services/. These guys are even well trained. They executed the work in record time, the paint was stretched perfectly and clean , and they are also very generous with the offers. I hope I helped you.

"You will lose a lot of time, which you will not recover."

As will you digging up old posts with useless replies.