How do I redo my bathroom ceiling in mobile home?

A drywall lift will be invaluable. Especially if you are working alone or with a person of small stature. Lift each drywall panel in place and secure with drywall screws using a dimpler (small attachment that costs $1 from hardware store.)

Using drywall compound and tape, cover each seam. Use a 4" drywall knife. Let this coat dry. Sand lightly. Follow with second coat of compound using 6" knife. Once dry, sand lightly and skim coat using 10" knife. Once dry, final sand, prime and paint.

Did you get all the mold killed? The spores are now in your home.

Did you get all the water leaks stopped?

You can buy 1/4" drywall and you can buy lightweight drywall, that will both help. Make sure you have sufficient blocking at the edges of the ceiling.

On the drywall compound, go easy on the coats. Sanding overhead is a pain in the neck.

I covered mine with knotty pine slates from Lowe’s all you need is nail gun and saw clear sealant or you can whitewash the boards I’ve done both

Good Morning Lisa,

You can get a kit at the big box stores that will give you a reading on mold in this room...they are not expense and should be done. You send off the test and get the results back in the mail.

Since bathrooms are usually small with a lot of un-movable fixtures in them, making them the most difficult room in he house to work in, you might want to consider using beadboard instead of drywall.

Beadboard come pre-primed and you can paint it before it goes up. The beauty of this is that it seams together really well, you nail it with finishing nails and then fill the nail holes with caulk...no taping, mudding, sanding and worry as with drywall. Put it up, add a simple molding (a large quarter round or a flat molding like shown in the photo will work) and you are done. You can add corner pieces to add some accent...on the ceiling, just turn the pieces down (we cut these shorter for balance of size.) The molding butts up to the edge...no miter work required.

Beadboard was used on ceilings for years! The photos are on walls but it is great for ceilings too.

Here is a ling on photos of beadboard ceilings:

https://www.google.com/search?q=beadboard+on+ceiling&rlz=1C1GGRV_enUS751US751&oq=beadboard+on+ceiling&aqs=chrome..69i57j0l5.4719j0j7&sourceid=chrome&ie=UTF-8

And for a small room, it is that that expensive.