@Sheriiff "Speculating £5k of this on a one-off tournament does not affect my ability to play this limit"
You continue to be way off here! Buyin 5.000 lottery tickets for 1 pound each, may not "affect your ability to play your limit" but it still makes no sense and has -EV.
Investing 5% (adding fees+costs that might even be 6 or 7% unless the event is next door) of a 100K bankroll into a mega high variance event like an MTT, is overbetting your bankroll. Thats a fact.
You would have to feel that you have a massive edge over the field to even consider it in my oppinion, because then the +EV might be interesting enough to "justify" overbetting your bankroll.
"Similarly, a 'reasonable bankroll' for someone who solely plays single table SnG's is anything from 30-50 buy-ins. I've seen some full time players recommend a bankroll as low as 20 buy-ins but I'd say this was pushing it. "
LOOOOOOOOOOOOOOOOOOOOL. I feel of my chair and rolled on the floor reading that. Try 8tabling STTs with a bankroll of 20 units. You could be busted within 2 hours. Common wisdom amongst STT pros is that you need a bankroll of 100 units to be safe (albeit you may very well "get away" with less units).
If you actually read my post again you'll see that I said that I've seen pro SnG players recommending a 20 unit buy-in. You'll also see that I didn't agree with this. Also, who said anything about 8-tabling on a bankroll of 20 SnG's? Multi-tabling brings a whole new series of considerations, as it undoubtedly reduces your ROI in the long-run compared to single-tabling.
Also, if you think that buying 5,000 lottery tickets and entering a £5,000 buy-in MTT are equivalent decisions then I'd question why you bother to play poker at all.
Sheriff