If you are only going to be using it for 10-15 minutes a day then you could use a pair of two small 12 Volt 5Ah batteries. We have a controller with reverse (SPD-24500R) - that is no problem. We also have thumb throttles and handlebar mount switches that could be used for the reverse switch. Here is a parts list:
I got your email stating that you would like a kit made with all of the parts listed above. I went ahead and made the kit for you. The kit wound up going a little over budget so I discounted it by $30 to bring the price down to $280.00. The value of the kit if all parts were ordered individually is $310.59 plus $25.00 labor to install the matching connectors.
I had to include an on/off switch for the controller so I added a toggle switch to the kit for that. You could have a key switch or handlebar mounted switch to turn the controller on and off if you prefer. Also the kit has a handlebar mounted switch for reverse. This reverse switch could be changed to another switch type if you prefer. Our handlebar mounted switches are for 7/8" OD handlebars - so I would make sure they will fit your project if ordering the kit with a handlebar switch. If the handlebar switches do not fit then we can change them to toggle switches or another type.
Here is a link to the kit: KIT-132-2
Please let me know if you need any changes made to the kit, or if you have any questions.
I want to power my wagon for a beach with thick sand. I'm looking for torque more than speed. Will be carrying typical beach for the day stuff( cooler, chairs, umbrella, etc), probably no more than 200lbs w wagon weight. Right now I have nothing. Just the wagon so I'll need everything needed to do this project. Can you help me with a parts list?