The Boulder City Airport offers multiple locations for Transient and Long Term parking. As indicated above.
The North Tie Down offers assigned parking for long term renters and the Transient Ramp, just south, for transient and long term parking, as well.
$5.00 single engine per day
$7.50 multi-engine per day
$50.00 per month with a Tie-Down Agreement
BFE Flight Services provides aircraft parking as well; you can visit their website or call 702-228-0455 for more information on pricing.