Crazyskypilot,
Hi and welcome to the RC flying world. You have recieved some good advice so far. And they are accurate about
the AROUND $400.00 thing. Don't be discouraged! There are ways to go low budget here and still get your GOAL of a military(ish) trainer. You can get some decent gear used at about any club. We ussually have flight boxes and starters and such from guys who have quit, reasonable. We don't just give this stuf out to the latest guy that comes down the road though. Ther e is an endless streeam of those guys.
Don't buy anything yet. Join the AMA and then join a club. Get a little buddy box time so you know what is actually going to happen when YOU fly. This will let you know you need a decent trainer. Trainers need not, and in my opinion,and should not be expensive or complicated. Most are easy to repair, all of them will need repairs. Look at SPADTOTHEBONE.COM for VERY inexpensive plane options. DO read the sticky on begining at the top of this forum....those guys are the best info gatherers and online teachers bar none.
Any trainer can be colered or modified some to look miltary. Just don't change its flying ability. Your first plane's motor, radio and many other parts can transfer to your second plane. So buy a decent .45 and a RADIO THAT IS COMPATIBLE WITH YOUR INSTRUCTORS RADIO.
If you decide to buy a ready made trainer that looks military I'll second the Hanger nine P51, just loose ALL the extras from the get go.
Many of the guys with fancy planes started with a basic or used trainer and a cardboard box for a flight box. Don't sweat that stuff.
They'll be more impressed if you offer to help mow than with whats in your wallet! This is a well kept secret but students that help with the field work get more buddy box time