How can i replace my old garden tub with a reular tub and surround?

Hi, yes you can. Here's an in-depth guide to choosing and installing a regular tub in a mobile hoem- https://mobilehomeliving.org/mobile-home-bathroom-guide/

Here are some ways

https://mobilehomerepairtips.com/bathtub-mobile-home/

https://www.youtube.com/watch?v=-2ezwisStt8

https://www.youtube.com/watch?v=OwWkLVlNfSM

https://www.youtube.com/watch?v=yR0kA8WAPBk

You can, however you may want to ensure the floor of your mobile home can withstand the weight, etc.

Yes, you can. It's quite a bit of work and you may want to consider hiring a professional. Keep in mind, after removing the old tub, you will probably need to reframe for the smaller one. Here's a link with more information:

https://mobilehomerepairtips.com/bathtub-mobile-home/

The floor support is very important, as well as the backer-board for the surround...all this adds weight to the structure that needs plenty of support. Have a licensed and insured contractor come over and give you advice, get free estimates.

https://www.youtube.com/watch?v=tUjRWk_eOKE

Ask the Mobile Home Suppliers what is poissible to do, due to weight on floors etc.

After removing the old one, the flooring will have to be replaced or have something complimentary to cover the difference where the new footprint will be. You can purchase walls for a tub or buy an all in one (tub and wall unit). The biggest challenge you are going to face is getting the new tub into the bathroom. Not only does it have to fit in the bathroom door, it has to be able to make the turn from the hallway. Unless you are lucky like my parents' mobile home at the lake. The back door opens directly across from the bathroom door.

Yes, however you'll need to support it well. An acrylic tub is your best bet.

Sure you can, you may need to add extra support for the weight, which you should be able to do under the mobile.

Yes you can, here's a guide for that https://www.bhg.com/bathroom/shower-bath/replace-a-bathtub/