There have been a number of chemicals suggested for cleaning
. Please be careful about mixing them. Some don't play well with others and may produce everything from poison gasses to combustibles. Take care.
With marine epoxy
paint on the outside of the hull
to stop penetration and proper ventilation to keep the inside dry, you have many options to choose from as far as paints go. With proper surface preparation, just about anything will work. However, latex paint of any nature would not be among my choices.
It simply isn't durable enough and it's really messy to remove.
On the topic of black mold (and some other varieties), special measures need to be taken. There are serious health
risks. Wear protection. It is also difficult to eradicate and specific procedures should be observed. See: https://en.wikipedia.org/wiki/Stachybotrys AND CDC - Mold - General Information: Facts about Stachybotrys chartarum and Other Molds
Some mold spores have a hard impenetrable shell. They can lie dormant for ages and return with a vengeance when the environment
becomes favorable. The most effective treatments I've seen are sold in swimming pool supply stores. Might be worth looking into because mold remediation typically calls for a lot of very destructive measures.
For fabrics (I haven't heard much in this thread about the inevitable stains on curtain, cushion covers, bedding and carpets) I'm sure you have all heard about mixed about 1/2 cup of hydrogen peroxide, a few teaspoons of baking soda (or more as an abrasive), and a squeeze or two of Dawn dish washing
liquid. The Dawn breaks down grease, oils and organics while the Hydrogen Peroxide doesn't like anything. Hell, it doesn't even like itself.
What you may not have heard is using a little CLR (calcium, lime and rust remover) first, to treat tough water
and rust stains on fabrics. Just be sure to rinse well with clean, clear water
before using the HP, BS and Dawn concoction to finish removing the stains.
Congratulations on you new boat and I hope things go very well for you! I'll be following to see how things go!