I agree with the prior answer - a mere contention, without additional information or evidence of the cause (and the facts surrounding it), will not support liability or responsibilty by the builder (or anyone else). Side note: based on the age of the home, it may be subject to the statutory "Home Builder's Right to Repair Statute" Civil Code sec. 896....and likely warranty or other contractual requirements. Specific timelines and requirements apply to avoid losing those rights. ** This...
Depends on whether there are valid governing documents (CC&R's), and/or other contractual requirements that are related to the land you own (including whether you can get offsets). The complexity of the question suggests that you should take this issue to a lawyer that specializes in HOA law.
A mechanics lien (sometimes known as a contractor's or construction lien), is a statutorily created lien in NV. To make it valid (also known a "perfecting"), you need to comply with all of the statutory requirements, including specific timelines and notices to the required parties, including the GC, owner, lender, etc.. You need to determine your timeliens asap, and likely seek a lawyer's advice if you cannot figure it out promptly, or you may lose some or all of your rights to collect.