Be sure to frequently check the air filters on your tools. Clogged filters can choke an engine and many filters can be cleaned and reused.
Choose your lender carefully. Look for financial stability and a reputation for customer satisfaction. Be sure to choose a company that gives helpful advice and that makes you feel comfortable. A lender that has the authority to approve and process your loan locally is preferable, since it will be easier for you to monitor the status of your application and ask questions. Plus, it's beneficial when the lender knows home values and conditions in the local area. Do research and ask family, friends, and your real estate agent for recommendations.
Welding inside of a shop or garage can create fumes. But they can easily be removed from the area by using industrial-type fans, or you can make your own from a recycled forced-air furnace fan. Check with the installers in your area for used fans; the cost may not be more than about $25, or they might even give you one. Cover the intake and all moving parts with heavy metal mesh, and run the power cord through a switch for easy on-off control.