While I have a feeling you will likely do
CS here is a list of needed gear for a US Infantry Private... it isn't too much different for a
CS troop and all of the vendors I mentioned do sell
CS gear. CW re-enacting is a classic example of getting what you pay for. While your best bet for inexpensive is to try to buy used gear from your pards; you will need to get some new gear. You are looking to spend upwards to $1500 initially; there are some things you can skip initially but they are items you will need. Stony Brook for example has a consignment page and you can find some real jewels.
One thing I haven't mentioned is Loyalist Arms intriguing Lorenz... it is inexpensive and looks pretty darned nice; not to mention being probably the most underrepresented arm in re-enacting. That said stay away from anything else except perhaps their Enfield.
Good Luck
Required: (for active members to pass muster)
Forage Cap: M1861 regulation (or 1858 or 1862 “Hardee” hat)
Sack Coat: M1858 lined or unlined with pocket, according to regimental pattern and materials.
Trousers: M1861 kersey wool, side seam pockets, according to regimental pattern and materials.
Shirt: regulation slit front style, wool or cotton, according to regimental pattern, or civilian style and materials subject to approval, or late war placket front gray wool issue style.
Shoes: laced bootees of regulation pattern, or civilian boots subject to approval.
Cartridge Box and US Plate with Shoulder Belt and Eagle Plate: M1855, 69 or 58 calibers.
Cap Box: regulation triangular from pattern.
Waist Belt and US Plate: buff or smooth leather, brass or leather clip.
Bayonet Scabbard: buff or smooth, with integral frog, Springfield patterns.
Musket or Rifle-Musket with Angular Bayonet, following patterns: US Rifle Musket Models 1855, 1861, 1842 US Musket Models or such as approved by the unit. Foreign muskets or rifle muskets with 3 barrel bands (e.g. Enfield) and a total barrel length of approximately 40” in percussion or percussion conversion.
Replicas of any of the above specified arms are acceptable.
Additional Requirements: (for active members who have passed muster) Poncho or Gum Blanket: of regimental pattern and approved materials.
Canteen: of smooth or bulls eye pattern, of brown, gray, or sky blue color and of kersey or jean cover.
Haversack: tarred and of approved pattern or White Canvas of approved Union issue.
Blanket: tan with dark brown stripes (gray acceptable).
Mess Gear: fork, spoon knife & plate of period style.
Shelter Half: of approved pattern.
Tin cup of approved pattern.
Suggested Vendors Firearms
Lodgewood Manufacturing
http://www.lodgewood.com/ (consignment page often has wonderful deals)
Regimental Quartermaster
http://www.regtqm.com/productindex.html (their de**** section is second to none and they have the best selection of various Enfield models I have seen.)
Upper Mississippi Valley Merchantile Co
http://www.umvmco.com/ (best non de**** deal for price)
Leathers & non uniform gear including brogans & tinware
James Country
http://jamescountry.com/
Upper Mississippi Merchantile Co
http://www.umvmco.com/
Missouri Boot & Shoe
http://www.missouribootandshoe.com/index.asp
The Jersey Skillet Licker
http://www.skilletlicker.com/ Uniform
Stony Brook & Co
http://www.bridgemicro.com/msullivan/catalog/index.htm? (Trousers)
Regimental Quartermaster
http://www.regtqm.com/productindex.html (Campaigner Corner for excellent Sack Coats)
Waumbaugh White & Co
http://www.wwandcompany.com/ (excellent Sack Coats)
CJ Daley
http://www.cjdaley.com/ Superb gear for those who want everything right.
Hats
Dirty Billy Hats
http://www.dirtybillyshats.com/
Clearwater Hats
http://www.clearwaterhats.com/ Eyewear
Variety of sources
http://www.jastown.com/acces/acces.htm http://www.metiques.com/catalog/glasses.html