Pandemice

I have played story mode almost all the time I've played rdr2, but lately my friends and I wanted to play together so we decided to play RDO, and in Rdo I was really behind, so I wanted to find a faster way to gain money and all. So, I decided to do hunting, but because I have only one horse, I can only carry one carcasses and a few skinned animals pelts. And then I saw the hunting vehicle that was available in the stables, but sadly I needed to be at level 10 trader. So my question is how long does it take to level up to level 10 and what can I do to level up faster? thank you...