Wellcome to the forum
If this is not a wind up (possibly is not) you need to clarify the following:
1. What is you budget for the boat?
2. Do you ant it to be brand new of second hand
3. Excpet the 'girls'
what type gear you planing to carry on the boat?
4. How far offf shore are you planning to go??
5. what range do you want this boat to have
There are many other points but these (I think) are the VERY BASIC ones!!
Now the gear you mention
a. No need of a helmet. You need a wooly hat or something to cover your head. (Most of your body temp you are loosing is from your feet, hands and head so keep them well insulated)
b. You need diving type gloves or waterproof groves but good ones
c. A dry-suit. There you can get a breathable, talking, walking, thinkig suit (something like Keith's LOLOL
) spending unjustifiably a lot of money or better you can go for a middle of the road budget dry-suit for about GBP 150.00 in the UK or if you look outside the UK you get a breathable dry-suit for between 40-70 pounds (NO UK RIP-OFF DRY-SUIT GEAR)
If you need names of sites where you can look for boats, engines, gear etc please let us know.
Good luck with the girls!!