There is nothing wrong saying starting at ______price. If that's the minimum charge.
How can you word an "honest ad " that thousands could see? Something needs to get attention.
"Weekly lawn service starting a price that cant be fully determined until we completely examine your property for fences, gates, garden hoses and dog waste. Call today for your overly complicated price quote!
The above is to be considered humor.
The object of advertising is making the phone ring and people visiting business's and then selling service or product.
If they don't feel that the price and value are worth it they will not hire you.