When relocating to Paraguay, rent first! Get a feel for the different neighborhoods and how to get around, to work and entertainment.
Always seek competent professional advice especially when dealing with Paraguayan real estate, there is no centralized database of properties and anyone can find a real estate deal so competent representation is crucial. I’d always recommend an attorney draw up your sales contract from scratch. Depending on your situation this can vary generally from USD$250 to 600 but is well worth the anxiety and agravation you will avoid later on in the transaction.
Also keep in mind that for the buyer, commissions are above and beyond the sales price as negotiated with the seller so keep 7-10% on the side for transactional fees, commission and “misc” things that need to be taken care of, the seller pays the taxes and that’s typically it, unless otherwise negotiated.