Okay...I have a husband who does not like to spend money unless necessary. Now every marriage is different and every personality is different, but this is how it worked for me. And for god-sake do not withhold sex. Women have power these days and we have moved beyond that. Plus why punish yourself in this endeavor. ;)
- He saw how much I loved working with my smaller tank and maintaining it. He made comments about how happy he was that I enjoyed the hobby.
- When you are at the lfs together, casually drop a comment that you love tangs, but your tank is too small. Don't milk it or get dramatic. Just make a casual comment.
- I taped an outline with painter's tape of the size tank I wanted on the wall where I wanted the new tank to sit -- exact size and dimensions and left it up for days (it was around the TV). I told him I was just seeing what it would look like. I even took a picture of it and texted it to him when I first did it.
- I developed a budget and plan for how to save up to get the set up I wanted and talked about it constantly. I did not beg or ask. I just said that I really wanted this and that I was hoping it would eventually work.
- My husband likes to feel useful and loves to "help" fix things, make things etc. I asked him if he had any suggestions for setting up electrical, plumbing etc, for a tank on a budget -- I was still going to do what I wanted, but I included him. He now thinks all of that stuff is his responsibility. He built my new RODI system/top off and has it running into our sprinkler system. He thinks it is his and he constantly maintains it because he likes to help. You mentioned your husband is an electrician -- perfect.
- Eventually, he will say."You know...maybe we can make this work."
Keep in mind everything takes time in this hobby -- including upgrades. This is a slow process and it takes steps. If my husband came to me and told me that he wanted to spend thousands and something, I would hit the breaks too. It is something that needs to be eased into. When my husband told me he wanted much larger tires for his Samurai for off-roading, it sounded expensive. But he told me the reasons why. Time passed, and I bought them for him for Christmas. We spouses have to think expensive things over first and process the information.
Good luck! I can't wait for the build thread. :)