That is one sweet 6er! My advice would be to get it however you need to do that! If that means selling, OK or if that means waiting. Somehow just do it as that bass looks like a winner.
And let me justify this advice a bit. In my opinion learning to what a 5er is REALLY all about takes playing a 6er first. A 6er forces you to deal with all the things you've been ignoring: Extended range, wide flat neck, string damping, cross-neck scales and patterns. I tell you true, I never really understood what a 5er was all about until I got my first 6er. Yours looks a lot like my first 6er (an Alembic Epic fretless (!) 6) The truth is that for quite some time that Alembic was WAY too much bass for me, but eventually I grew into it and the education was priceless.
Yes, today I'm playing 5ers just because muscially I don't need the 6 and the 5ers are a bit lighter and the necks a bit narrower. But I do still have all my 6ers and I still do play them from time to time. Once you understand how it works 5, 6 and 7 strings seem to become just variations of the same instrument.
I don't know if your music really needs the extended upper range of a 6 string, but from an educational viewpoint, I'd urge you to take time to learn what it's about. Learn solos and chords and double stops etc.
That, plus the fact that is one killer looking 6 in layaway, is why I say go for the 6.