yes...the eligibility letter actually is saying that you as the borrower are eligible based on your income, credit, repayment ability. If you have found a home in an eligible area, you are getting closer, now it is on the builder to make sure that it is up to USDA standards, and the person that is working on your case will handle all paperwork and requirements to make sure that the builder is following through, but I would definitely keep in contact with the builder and case worker, so that if communication stops between the two (maybe if the builder falls behind in scheduled process). Touch base I would say at least twice a week, and make sure if the case worker or builder says that they are expecting info from the other, be the middle person to make sure that it was received. Even if you have a realtor communicate often...as the builder, agent, or realtor...they may be working with diff clients/cases and you don't want to fall between the cracks. This is your best interest. Have you taken your homebuyer course yet, you may have to continue to submit monthly pay stubs (im not sure) until the loan is actually "funded". Once the builder is complete, USDA will go inspect the property, if everything is ok and all paperwork from you is submitted, they send you a TRUTH IN LENDING to sign and send back, and schedule a time for you to come in/or over the phone to go over your packet, costs, making sure you understand the loan, any subsidy requirements etc. while waiting for the loan to be funded (money transferred). Relax and remember this is worth it. One more thing, they will require you to pay for your first year premium of your home insurance and your credit report. 
