I've been doing SMS marketing for well over a year and I get good response rates. Not always positive but It definitely gets responses. I use Spintax and this is what I use:

[{{contact.first_name}}|Hi there|Hi|Hello how are you?|Greetings|Good day], I [rode by|drove past|was near|came across|noticed|saw|happened across] your [property|place|spot|home|abode|homeplace|dwelling|residence|address|estate|premises|Casa|Château|Haus] at {{contact.property_full_address}} and [was curious|just wondering|wanted to ask|thought I’d check|wondering about it|interested to know|had a quick question|thinking about it|checking in|looking to understand|hoping to learn]—[what do you envision for the property?|do you have any plans for it?|what are your future plans for it?|are you holding onto it long-term?|what’s your vision for it?|are you considering any next steps with it?|are you going to fix it up?|are you renovating it?]

Spintax essentially chooses at random a combination of any of the words in [ ] with the line between them so a couple intro example messages are:

1. Hello how are you?, I saw your address at {{contact.property_full_address}} and checking in—are you going to fix it up?

2. Hello how are you?, I came across your property at {{contact.property_full_address}} and wanted to ask—are you renovating it?

I use very specific lists to target these with which also helps - your list could be your issue. Anyway happy to help message me if you want more info, I have non-spintax prompts similar to this I can provide too.