The best advice I can give is look to for 10 room mates with good credit histories.
Upon finding those 10 room mates, each look to acquire credit cards with at least £12,000 credit limits (it's likely this will be spread amongst a few cards).
After receiving your credit cards it's of great importance that you each withdraw the maximum of you can via cash machine (£500 a time means 24 withdrawals).
Pool your money together so you have £120,000 in total and then approach a mortgage broker to apply for a 'joint' mortgage.
Once you have found a house for around £950,000.00 use the deposit money and apply for a 25 year mortgage fixed at a rate of 5.75 for 5 years.
That'll equal a monthly payment of just £5,221.58 a month, or £422.00 split between 10 room mates.
Therefore meaning you'll be spending nearly 50% less than the £800.00 a month you first stated and be acquiring an asset

(I understand some many say this is not 'constructive' advice, although that is entirely subjective for reasons I will respond with if asked)