It does make it easier if you have tanks, but there are a lot of smiths that will blue it for you (except Kalif). You can do all the polishing and then send the rifle.
I use SavageGunsmithing
They do a good job and I have no doubt that if you preped the rifle, they would charge you a reasonable rate to just drop it in the tanks.
I would buy a bottle of Hold from Brownells and spray it down before shipping, right after you are done with the polishing to insure that no surface rust got on the parts.
You will get fine surface rust very quickly if you don't protect the metal.
Your other option is to buy one tank from brownells, big enough to hold the rifle and use a camp stove to heat the water and do a rust blue job. It takes some time, but a rust blue is so darn beautiful. You usually only polish to about a 400 grit with the rust blue, it does not take well on super smooth polished surfaces, but it produces the finest bluing you will ever see.
It does take a little time to do as you have to apply the solution as many times as it takes to get the color you want. You rub down the gun with fine steel wool, put boil the gun, put more solution on the metal, it will rust right away, let it sit per instructions, boil it again and just keep doing this until you get the nice dark bluing that you want.
I have rust blued many guns, it takes some time, but is not hard to do at home. Brownells has the rust blue solutions.
The gun comes out blue, not black like regular bluing. looks like the guns of old.