Alright, let's assume you do this. The average AR15 (which is a shitty gun, but it's cheap) costs about $600-$1,500, depending on where you buy it from/who makes it/etc. Next, we'll need ammo. AR15's typically use 5.56 rounds, which are roughly $4 per 100 (although you can likely find cheaper). According to a recent US census, there's about 5 million jews in the US (likely more due to it mainly relying on jews who openly identify as jews) - so you would need 5 million bullets, or $200,000 USD on bullets alone. This doesn't take things like cartridges, magazines, etc into account. You could go with 9MM ammo instead to bring the cost down to about $175,000 USD (you can find 1,000 9MM cans for about $35), but then, you're using 9MM ammo. In any case, this assumes you hit with 100% accuracy - and unless you're Finnish and fighting against retarded slavs, this is HEAVILY unlikely. Still, we'll give your retarded Übermensch fantasy the benefit of the doubt, and assume you have about a 50% fatal accuracy rate. That's still $400,000 for ammo, assuming it takes an average of 2 bullets.
Now, we'll have to take fuel for travel into consideration. At its cheapest, you can find gasoline prices to be $2.50 (obviously much more in shitty states like commiefornia). So with a car that has a 40 mile-to-gallon highway efficiency and has about 15 gallons, you'll be making stops about every 600 miles at least. This doesn't account for the frequent stops, food breaks (which we'll be lenient and pretend you just grew and/or smoked all of the food yourself), etc which drastically reduce efficiency, but still. That's about $37.50 every 600 miles - and you'd need to be doing a LOT of traveling (the trip from California to New York, for example, is about 3,000 miles with no stops - good luck having no stops). Even assuming you managed to do it in about 60,000 miles total, that's $3,750 USD - at the CHEAPEST gas prices in the BEST fuel efficiency in a car that would easily cost $20,000 and up (Kia Forte, capable of 40 MPG highway, is about that much depending).
So thus far we've spent about $424,350 USD buying the cheapest gun, ammo, and car options with insanely unrealistic efficiency and absolutely no other costs included, at the CHEAPEST rates available. Next, we have to account for time. The average highway speed limit is anywhere from 60 to 75 MPH, but we'll be generous and say you can haul ass at 90 MPH consistently and with no stops for your entire 60,000 mile trip. That's still about 666.666… (heh) hours. Of JUST DRIVING. That's almost a month of nonstop driving.
Or, you could spend $424,350 USD and 1 month to REALISTICALLY buy a piece of fucking land, travel to it, and start growing a family there and invite those you trust to create a commune on that land. For frame of reference, you can easily find 10+ acre, ~$300,000 properties with homes already on them in states like South Dakota and Iowa.
You stupid fucking cunt.