Why pay $2900 for something that you could build got <$1000 with the same materials from Lowe’s?
Watch a bunch of YouTube videos on ramp building. My non skating, non building friend just did that and built a mini last month for his kids.
As for the size, that’s a bit small but I don’t know about your skill level. A lot of people won’t admit it but you can get very comfortable with learning stuff on something that small without fear of getting completely worked. The negative is that you can also develop really bad habits like cheating on fakies and disasters that will come back to bite you on bigger stuff.