Picklehead, I assumed you are departing from USA.If you have enough time before departure, get Nepalese visa for a month ($40) from Nepalese Embassy, Washington, DC. All you have to do is send your original passport, a filled out visa application form, money order of $40 and paid return envelop. Check out the website of Nepalese Embassy at DC to make sure if any additional requirements need to be met currently. The Nepalese Embassy takes usually 7-10 business days to issue you the visa. Since you are visiting to Nepal for 35 days, you can go to Department of Immigration at Kalikasthan, Kathmandu to extend your visa as many days as you want before your visa will expire. In this way, you can save some money on visa. You can also get the Nepalese visa on your arrival at the TIA in few minutes but its hassle free if you already got the visa on your passport. You might have heard enough about the employees at Immigration department at TIA. They may give you hard time unnecessarily in order to extort money from you by showing any reason. Just my personal suggestion. Have a nice trip to Nepal.