Find a service you trust and use it. The reason of a former pre-press technician is that maintaining knowledge of that expertise and getting the equipment a person would want to use is far more expensive than making prints at a service. It is true that each individual print costs more, but we cannot negate the cost of the printer and our time and maintenance. Instead of working on more images, we are caught at the printer running through sheets, calibrating and testing, when a service will do this all for us. The cost of the printer is one most people leave out of their calculations.
The envelope printing service you use should have leading edge technologies. Machines costing $10,000 to $100,000 are not those you will buy for your home or even for your business unless your volume is very high. The $100,000 printer will do things that your $1000 home printer is incapable of. Using a service We do not have to maintain various paper stocks, and always have flexibility in my options for output. If I am in a business where I rent by the sq. ft., I don’t need to relegate a portion of that to my printer stock and supplies. I also do not have to maintain cropping equipment, and expensive printer calibration devices.
Depending on what you do the home printing option may be viable. But for me I stick with the service and end up printing what I need for decidedly less…The best of both worlds.