Excluding the kit for HFT, which can be on par with decent FT kit, the cost of consumables / travel / hotels / socialising is by far the most expensive bit.
Yes, you can do it cheaper, but you miss out on a really good social side travelling as a club team.
prices starting as per below and can be competitive, but can spend "lots" more on kit
scope £70 (used sr6)
gun £250 (used s400)
annual pellets £300 (45 tins)
hotel / fuel / entry £430 (cheap this year for 9 rounds)
£1160 total and you still have the kit assets at the end of year.