welcome. Nice brother. For this fix I would go to a LBS, because they should allow you to try a couple of different stem length/angle combination. Some stems have adjustible angles. I don't think you will need new break lines, you won't be making that radical of a change, looks like there is some play in the lines already. Depending on the stem you probably can get one for around $30 - $35 and you won't save that much compared to the value of having a LBS help you out and get acquinted with them.
Nice pics of the bike.
Also, check with your brother to see if you can lockout the suspension. He may think you are nuts, but if you are riding on the road it will help.