One thing you should all realise, whatever action you take.
If you tax/insure your vehicle for ANY length of time and then SORN it after say, 1 month, your insurance will be classed as a short term insurance and you will have to pay a fortune in penalties.
Happened to my daughter last month. Taxrd her car for 12 months, insured it for 12 months then it blew a Head Gasket. She can't afford repairs for a while so SORN;ed it and put it up for sale. Cancelled the insurance and was told she would have to pay over £280 plus £75 administration charges as the policy had been converted to a short term one. Read the small print and it is there in black & white, buried amongst other clauses. Total cost including the month she paid for and the months deposit was £475. Cost of insurance for the year was just over £700. I asked about transferring the insurance if she got another vehicle and the anser, again in the small print, was no, thats not possible.
For anyone on a tight 'BUDGET' (hint, hint), stay away from the smaller companies or read ALL the small print and understand it before committing yourself to buying from them.