Hello Cate, this domain name choice is feasible because it is .com and contains two Dictionary Words. Additionally, you have chosen a plural format of the Noun, which historic studies and surveys have shown that a plural name in this particular format is likely to attract more type-in traffic than the singular version.
A basic metric analysis of the two Keywords;
Rolling
CPC: $1.33
Search Volume: 11,100,000/mo
Tips
CPC: $1.46
Search Volume: 30,400,000/mo
These numbers are encouraging and may indicate a name that could generate Parking Revenue. However with the two words combined the average monthly search results decline rapidly;
CPC: $1.95
Search Volume: 4,400/mo
I'll assume you have tested parking with this name. I would not describe this name as 'Liquid' but nevertheless, commands a 'Buy Now' price tag between $499 and $999.
I Love to Smoke, and smokers with a rock solid set of genes still, Love to Smoke, there will always be at least a niche market for physical Rolling Tips and advice on how to roll your own.
Regards.matt