I am sorry but for some reason when most guys say they need help 90% of the time the excuse is I don't have a welder. You can go to Lowe's or Home Depot and you can be set up with a Lincoln 115 Volt wire welder for approx $500.00. (That is including Helmet, Gloves, Welder, Wire, Renting Argon tank and all) You can weld up to 1/4" OK with this setup. (May be better welder for the money this is just what I have)To start out you will also need a decent 4" grinder (Dewalt, Makita etc) for $100.00 or less. In my opinion Harbor Freight **** is a waste of money in this area. If you do not have a torch get a sawzall $80.00. This is not the best setup but it will get you by till you figure out if you can do this or not. For $700.00 you will be able to do a good bit of fabrication. I am on a budget just like most people and it may take a month or two to be able to afford the above items but you have to start somewhere. Also remember the above items you will use on a regular basis if you wheel. That is just the way it is. If you buy the above items and you are not able to get the art of welding down you can always sell the items and get most of your money back.
If you do not know how to weld find you a fab shop and stop by and they will probably give you a few pieces of scrap or at least sell it to you real cheap. Welding with a wire welder is not that hard if you take your time and practice and you will figure it out.I have learned how to weld from practice and listening to people when they talk. (If it is a cage or something protecting your life then let someone you trust do the welding)
If you do not want to do it this way get all your stuff fabbed up so it is just welding that needs to be done then ask for some help on just welding.
I have met some of the guys on hear and some I have not but they are a great group of guys and they have a ton of knowledge. You make an honest effort and they will help push you to get it done.
I am no pro at welding but I can usually do a decent job to get myself by.