I do them mate, heres some ideas for you, border pattern may be a bit too optimistic for a DIYer ,some of the mitres are a bit tricky, but they dont need them to look good, if its straight and level it will look fine without the border, im just a flash fucker with too much time on my hands, enjoy....
If you chose to opt for the border the key is in the preparation of the framework underneath as you will need extra carriers in to take the boards, and each boards mitre is an individual scribe and it takes fuckin ages, like this....

, see none of the boards are the same size so you cant be multi cut, I would leave the border out if I was you.
Boards up here are £6.20 per 4.2m length, and you need 8 per metre if you buy 5" wide ones, so thats £6.20 x 8 = £49.60 per metre over 4.2 m length, so its basically nearly 200 quid for a 4.2 square metre section of boards, but the frame work is £7.20 a length and you will need about 15 for the above size.
Ask any question you like mate and I`ll talk you through it.