It seems like you have to produce good, well known tunes to get recognition from agencys/promoters before you can get any major bookings (ie Slammin, One Nation, Breakin etc)
However there are a few DJs out there who do not produce but just get good recognition for their skills and getting there name about through pirate radio/posting up mixes (ie Mr Coshh
)
It seems like if you want to make money in DnB, you have to spend a bit of money as well (buying studio equipment)
There may be a loss for the whole vinyl thing. Its down to a few factors really,
Such as digital sales and does your tune appeal to a wide selection of people? Therfore will it sell well and how quick will you gain your investment back.
Also if you start a label and you decide to distribute your music yourself, you have to go to a majority of record shops all around the country (whom may not even want to buy your tunes, even on sale or return) and then a few months later chase some of those shops up for payment, which can be a long daunting process and may also cost you a fair bit in travel expenses. Some shops might even close down and scarper without even paying you a penny. Its a big risk to take if you do it yourself.
However you could get a distribution company to distribute your music for you ( LOAD Media are pretty good for taking on fresh unknown labels). This is probably the wiser option, but you would not make as much profit as you would if you distributed for yourself, as the distributors take a percentage per unit of vinyl sold.
Hope thats given you a small insight mate. BTW you heard that Nu:Tone remix of "Feelings"? I know the original is a favourite of yours.