Well,getting your motorbike fixed is your priority,with a new led light a close second.
You will get smaller yields per plant ,but you still might get what 2 or 3 plants would have produced
under the same light.
Your Vipar 300 only covers 3ft x 2ft area,so youre going to have to cram them into that space.
They probably wont grow that big anyways coz of only 30w of light each.
When you get another light,i would suggest getting a one with a flowering spectrum,ie more reds.
Once your plants stop growing in hieght,they dont need as much blue light,they still need some,but need more reds.Thats why most growers supplement led panels with red cfls or hps in flower.
I like your ps. YNWA but dont forget JFT96